Month	Hours
1955-01-01	965000000
1955-02-01	926000000
1955-03-01	1042000000
1955-04-01	1002000000
1955-05-01	1020000000
1955-06-01	1024000000
1955-07-01	1035000000
1955-08-01	1055000000
1955-09-01	1100000000
1955-10-01	1106000000
1955-11-01	1105000000
1955-12-01	1104000000
1956-01-01	1075000000
1956-02-01	1027000000
1956-03-01	1079000000
1956-04-01	1061000000
1956-05-01	1070000000
1956-06-01	1099000000
1956-07-01	1079000000
1956-08-01	1099000000
1956-09-01	1080000000
1956-10-01	1147000000
1956-11-01	1113000000
1956-12-01	1023000000
1957-01-01	1074000000
1957-02-01	1011000000
1957-03-01	1058000000
1957-04-01	1053000000
1957-05-01	1095000000
1957-06-01	977000000
1957-07-01	1064000000
1957-08-01	1048000000
1957-09-01	1045000000
1957-10-01	1100000000
1957-11-01	1076000000
1957-12-01	1021000000
1958-01-01	1091000000
1958-02-01	1003000000
1958-03-01	1059000000
1958-04-01	1066000000
1958-05-01	1052000000
1958-06-01	1011000000
1958-07-01	1085000000
1958-08-01	1022000000
1958-09-01	1082000000
1958-10-01	1144000000
1958-11-01	1047000000
1958-12-01	1043000000
1959-01-01	1027000000
1959-02-01	966000000
1959-03-01	1006000000
1959-04-01	1076000000
1959-05-01	980000000
1959-06-01	1035000000
1959-07-01	1049000000
1959-08-01	1018000000
1959-09-01	1086000000
1959-10-01	1124000000
1959-11-01	1085000000
1959-12-01	1089000000
1960-01-01	1062000000
1960-02-01	1054000000
1960-03-01	1163000000
1960-04-01	1096000000
1960-05-01	1131000000
1960-06-01	1077000000
1960-07-01	1080000000
1960-08-01	1109000000
1960-09-01	1155000000
1960-10-01	1147000000
1960-11-01	1164000000
1960-12-01	1156000000
1961-01-01	1136000000
1961-02-01	1071000000
1961-03-01	1172000000
1961-04-01	1097000000
1961-05-01	1127000000
1961-06-01	1129000000
1961-07-01	1079000000
1961-08-01	1107000000
1961-09-01	1112000000
1961-10-01	1150000000
1961-11-01	1145000000
1961-12-01	1079000000
1962-01-01	1114000000
1962-02-01	1045000000
1962-03-01	1108000000
1962-04-01	1058000000
1962-05-01	1120000000
1962-06-01	1054000000
1962-07-01	1055000000
1962-08-01	1079000000
1962-09-01	1057000000
1962-10-01	1158000000
1962-11-01	1128000000
1962-12-01	1020000000
1963-01-01	1079000000
1963-02-01	987000000
1963-03-01	1045000000
1963-04-01	1065000000
1963-05-01	1090000000
1963-06-01	971000000
1963-07-01	1042000000
1963-08-01	1023000000
1963-09-01	1050000000
1963-10-01	1139000000
1963-11-01	1078000000
1963-12-01	1009000000
1964-01-01	1063000000
1964-02-01	1010000000
1964-03-01	1033000000
1964-04-01	1097000000
1964-05-01	988000000
1964-06-01	1041000000
1964-07-01	1064000000
1964-08-01	973000000
1964-09-01	1071000000
1964-10-01	1120000000
1964-11-01	1080000000
1964-12-01	1069000000
1965-01-01	1025000000
1965-02-01	1011000000
1965-03-01	1102000000
1965-04-01	1073000000
1965-05-01	1054000000
1965-06-01	1039000000
1965-07-01	1033000000
1965-08-01	997000000
1965-09-01	1082000000
1965-10-01	1080000000
1965-11-01	1084000000
1965-12-01	1074000000
1966-01-01	1023000000
1966-02-01	988000000
1966-03-01	1098000000
1966-04-01	1021000000
1966-05-01	1028000000
1966-06-01	1025000000
1966-07-01	980000000
1966-08-01	977000000
1966-09-01	1044000000
1966-10-01	1031000000
1966-11-01	1026000000
1966-12-01	980000000
1967-01-01	964000000
1967-02-01	890000000
1967-03-01	934000000
1967-04-01	903000000
1967-05-01	882000000
1967-06-01	930000000
1967-07-01	881000000
1967-08-01	876000000
1967-09-01	921000000
1967-10-01	968000000
1967-11-01	955000000
1967-12-01	883000000
1968-01-01	935000000
1968-02-01	902000000
1968-03-01	936000000
1968-04-01	931000000
1968-05-01	966000000
1968-06-01	860000000
1968-07-01	923000000
1968-08-01	923000000
1968-09-01	962000000
1968-10-01	1054000000
1968-11-01	1003000000
1968-12-01	927000000
1969-01-01	990000000
1969-02-01	947000000
1969-03-01	993000000
1969-04-01	995000000
1969-05-01	979000000
1969-06-01	958000000
1969-07-01	990000000
1969-08-01	930000000
1969-09-01	1031000000
1969-10-01	1110000000
1969-11-01	1036000000
1969-12-01	987000000
1970-01-01	1012200000
1970-02-01	1017000000
1970-03-01	1055200000
1970-04-01	1107400000
1970-05-01	997700000
1970-06-01	1048000000
1970-07-01	1048300000
1970-08-01	962100000
1970-09-01	1067500000
1970-10-01	1111400000
1970-11-01	1073400000
1970-12-01	1031200000
1971-01-01	994100000
1971-02-01	986100000
1971-03-01	1086900000
1971-04-01	1033300000
1971-05-01	984400000
1971-06-01	994300000
1971-07-01	979200000
1971-08-01	917200000
1971-09-01	1026300000
1971-10-01	1028200000
1971-11-01	1016100000
1971-12-01	960400000
1972-01-01	947500000
1972-02-01	955400000
1972-03-01	1014300000
1972-04-01	943800000
1972-05-01	963900000
1972-06-01	976100000
1972-07-01	900000000
1972-08-01	903500000
1972-09-01	956400000
1972-10-01	1012600000
1972-11-01	1004600000
1972-12-01	906400000
1973-01-01	969900000
1973-02-01	949100000
1973-03-01	998700000
1973-04-01	939000000
1973-05-01	993900000
1973-06-01	927300000
1973-07-01	886900000
1973-08-01	925100000
1973-09-01	941200000
1973-10-01	1033800000
1973-11-01	1000700000
1973-12-01	860600000
1974-01-01	942200000
1974-02-01	904400000
1974-03-01	933100000
1974-04-01	926200000
1974-05-01	947000000
1974-06-01	832400000
1974-07-01	871000000
1974-08-01	827200000
1974-09-01	887800000
1974-10-01	964300000
1974-11-01	891700000
1974-12-01	782100000
1975-01-01	827700000
1975-02-01	799400000
1975-03-01	790300000
1975-04-01	855300000
1975-05-01	771900000
1975-06-01	783700000
1975-07-01	759200000
1975-08-01	734900000
1975-09-01	822300000
1975-10-01	872400000
1975-11-01	807600000
1975-12-01	748900000
1976-01-01	771600000
1976-02-01	784100000
1976-03-01	855100000
1976-04-01	810900000
1976-05-01	801400000
1976-06-01	792200000
1976-07-01	746800000
1976-08-01	750600000
1976-09-01	843700000
1976-10-01	843700000
1976-11-01	845300000
1976-12-01	805500000
1977-01-01	790600000
1977-02-01	776100000
1977-03-01	863400000
1977-04-01	786200000
1977-05-01	788500000
1977-06-01	785800000
1977-07-01	707200000
1977-08-01	756700000
1977-09-01	824900000
1977-10-01	821900000
1977-11-01	822600000
1977-12-01	769600000
1978-01-01	799600000
1978-02-01	755700000
1978-03-01	786200000
1978-04-01	777600000
1978-05-01	749300000
1978-06-01	804100000
1978-07-01	710100000
1978-08-01	734400000
1978-09-01	789700000
1978-10-01	836400000
1978-11-01	815300000
1978-12-01	707500000
1979-01-01	785500000
1979-02-01	749800000
1979-03-01	817500000
1979-04-01	753700000
1979-05-01	798800000
1979-06-01	751800000
1979-07-01	739000000
1979-08-01	718200000
1979-09-01	767400000
1979-10-01	859900000
1979-11-01	818400000
1979-12-01	693900000
1980-01-01	795100000
1980-02-01	786600000
1980-03-01	806300000
1980-04-01	787900000
1980-05-01	746000000
1980-06-01	731200000
1980-07-01	750300000
1980-08-01	665600000
1980-09-01	791100000
1980-10-01	840100000
1980-11-01	760500000
1980-12-01	692200000
1981-01-01	722200000
1981-02-01	732200000
1981-03-01	773800000
1981-04-01	746500000
1981-05-01	715300000
1981-06-01	696400000
1981-07-01	706000000
1981-08-01	643200000
1981-09-01	762200000
1981-10-01	782100000
1981-11-01	749000000
1981-12-01	678600000
1982-01-01	681700000
1982-02-01	691000000
1982-03-01	779100000
1982-04-01	722000000
1982-05-01	681700000
1982-06-01	679600000
1982-07-01	639000000
1982-08-01	638000000
1982-09-01	716500000
1982-10-01	701600000
1982-11-01	696800000
1982-12-01	643900000
1983-01-01	648200000
1983-02-01	641100000
1983-03-01	724300000
1983-04-01	660700000
1983-05-01	659200000
1983-06-01	659400000
1983-07-01	601400000
1983-08-01	617600000
1983-09-01	695800000
1983-10-01	688600000
1983-11-01	689000000
1983-12-01	633200000
1984-01-01	672800000
1984-02-01	682700000
1984-03-01	693800000
1984-04-01	634700000
1984-05-01	675700000
1984-06-01	575400000
1984-07-01	630300000
1984-08-01	609100000
1984-09-01	654300000
1984-10-01	739300000
1984-11-01	691600000
1984-12-01	581000000
1985-01-01	669600000
1985-02-01	646300000
1985-03-01	687400000
1985-04-01	672000000
1985-05-01	663000000
1985-06-01	614900000
1985-07-01	663200000
1985-08-01	607600000
1985-09-01	677200000
1985-10-01	741900000
1985-11-01	679000000
1985-12-01	588100000
1986-01-01	672700000
1986-02-01	648600000
1986-03-01	644800000
1986-04-01	726700000
1986-05-01	627500000
1986-06-01	659800000
1986-07-01	676500000
1986-08-01	592700000
1986-09-01	701900000
1986-10-01	740500000
1986-11-01	663900000
1986-12-01	606200000
1987-01-01	634600000
1987-02-01	652800000
1987-03-01	692000000
1987-04-01	667300000
1987-05-01	636100000
1987-06-01	619200000
1987-07-01	629900000
1987-08-01	587700000
1987-09-01	683000000
1987-10-01	701800000
1987-11-01	668600000
1987-12-01	606000000
1988-01-01	617200000
1988-02-01	654200000
1988-03-01	712400000
1988-04-01	638700000
1988-05-01	638100000
1988-06-01	641700000
1988-07-01	578800000
1988-08-01	620200000
1988-09-01	673800000
1988-10-01	669700000
1988-11-01	672200000
1988-12-01	612800000
1989-01-01	661100000
1989-02-01	639900000
1989-03-01	675300000
1989-04-01	668900000
1989-05-01	622500000
1989-06-01	689100000
1989-07-01	614100000
1989-08-01	626800000
1989-09-01	669900000
1989-10-01	706100000
1989-11-01	687800000
1989-12-01	599000000
1990-01-01	676100000
1990-02-01	654900000
1990-03-01	710800000
1990-04-01	648200000
1990-05-01	687200000
1990-06-01	644400000
1990-07-01	643200000
1990-08-01	642800000
1990-09-01	667700000
1990-10-01	726800000
1990-11-01	698700000
1990-12-01	591700000
1991-01-01	829302000
1991-02-01	788946000
1991-03-01	790611000
1991-04-01	814458000
1991-05-01	757345000
1991-06-01	770582000
1991-07-01	762680000
1991-08-01	711923000
1991-09-01	769247000
1991-10-01	799232000
1991-11-01	758031000
1991-12-01	657256000
1992-01-01	741305000
1992-02-01	733256000
1992-03-01	768128000
1992-04-01	731634000
1992-05-01	693634000
1992-06-01	706001000
1992-07-01	688816000
1992-08-01	639596000
1992-09-01	722814000
1992-10-01	730240000
1992-11-01	692975000
1992-12-01	615519000
1993-01-01	618504000
1993-02-01	623139000
1993-03-01	697859000
1993-04-01	637423000
1993-05-01	599855000
1993-06-01	631368000
1993-07-01	584069000
1993-08-01	577555000
1993-09-01	637311000
1993-10-01	627324000
1993-11-01	623778000
1993-12-01	565937000
1994-01-01	577621000
1994-02-01	576063000
1994-03-01	644752000
1994-04-01	583086000
1994-05-01	582256000
1994-06-01	604751000
1994-07-01	547968000
1994-08-01	558883000
1994-09-01	613359000
1994-10-01	589330000
1994-11-01	606098000
1994-12-01	549908000
1995-01-01	588245000
1995-02-01	569721000
1995-03-01	633095000
1995-04-01	552703000
1995-05-01	598269000
1995-06-01	579342000
1995-07-01	545560000
1995-08-01	549397000
1995-09-01	582341000
1995-10-01	580611000
1995-11-01	601496000
1995-12-01	503584000
1996-01-01	559975000
1996-02-01	554361000
1996-03-01	564276000
1996-04-01	548689000
1996-05-01	540679000
1996-06-01	524992000
1996-07-01	540786000
1996-08-01	503066000
1996-09-01	546958000
1996-10-01	567571000
1996-11-01	556636000
1996-12-01	475418000
1997-01-01	525579000
1997-02-01	513504000
1997-03-01	514041000
1997-04-01	561960000
1997-05-01	486499000
1997-06-01	537387000
1997-07-01	545591000
1997-08-01	464144000
1997-09-01	547447000
1997-10-01	563003000
1997-11-01	541298000
1997-12-01	482911000
1998-01-01	519488000
1998-02-01	523645000
1998-03-01	572465000
1998-04-01	543487000
1998-05-01	520470000
1998-06-01	539076000
1998-07-01	554617000
1998-08-01	483425000
1998-09-01	558799000
1998-10-01	569992000
1998-11-01	562706000
1998-12-01	492159000
1999-01-01	503659000
1999-02-01	508619000
1999-03-01	575996000
1999-04-01	533104000
1999-05-01	504546000
1999-06-01	539516000
1999-07-01	522283000
1999-08-01	488379000
1999-09-01	546153000
1999-10-01	543697000
1999-11-01	560057000
1999-12-01	497695000
2000-01-01	507259000
2000-02-01	536935000
2000-03-01	570522000
2000-04-01	499972000
2000-05-01	563263000
2000-06-01	507370000
2000-07-01	509242000
2000-08-01	509596000
2000-09-01	533545000
2000-10-01	539590000
2000-11-01	561193000
2000-12-01	473565000
2001-01-01	534633000
2001-02-01	517270000
2001-03-01	561449000
2001-04-01	507018000
2001-05-01	538429000
2001-06-01	506466000
2001-07-01	511327000
2001-08-01	504347000
2001-09-01	510413000
2001-10-01	541857000
2001-11-01	537322000
2001-12-01	440924000
2002-01-01	508777000
2002-02-01	492504000
2002-03-01	498964000
2002-04-01	515638000
2002-05-01	476159000
2002-06-01	490653000
2002-07-01	505358000
2002-08-01	461838000
2002-09-01	497478000
2002-10-01	517264000
2002-11-01	506676000
2002-12-01	428957000
2003-01-01	801236000
2003-02-01	789092000
2003-03-01	805102000
2003-04-01	786526000
2003-05-01	775288000
2003-06-01	746189000
2003-07-01	817130000
2003-08-01	699317000
2003-09-01	803447000
2003-10-01	825794000
2003-11-01	791293000
2003-12-01	703734000
2004-01-01	758772000
2004-02-01	762391000
2004-03-01	851492000
2004-04-01	774640000
2004-05-01	741711000
2004-06-01	787635000
2004-07-01	783578000
2004-08-01	719368000
2004-09-01	800988000
2004-10-01	792703000
2004-11-01	816078000
2004-12-01	732730000
2005-01-01	757061000
2005-02-01	751672000
2005-03-01	783856000
2005-04-01	800130000
2005-05-01	730472000
2005-06-01	809210000
2005-07-01	754583000
2005-08-01	727354000
2005-09-01	788914000
2005-10-01	757909000
2005-11-01	809831000
2005-12-01	713470000
2006-01-01	686610000
2006-02-01	670113000
2006-03-01	743338000
2006-04-01	634149000
2006-05-01	694693000
2006-06-01	665148000
2006-07-01	663318000
2006-08-01	654548000
2006-09-01	683699000
2006-10-01	690921000
2006-11-01	723242000
2006-12-01	609411000
2007-01-01	710024000
2007-02-01	680712000
2007-03-01	736324000
2007-04-01	659147000
2007-05-01	685921000
2007-06-01	684962000
2007-07-01	698141000
2007-08-01	674787000
2007-09-01	680375000
2007-10-01	734321000
2007-11-01	735868000
2007-12-01	601796000
2008-01-01	725477000
2008-02-01	722065000
2008-03-01	681712000
2008-04-01	763112000
2008-05-01	674056000
2008-06-01	721054000
2008-07-01	729901000
2008-08-01	650941000
2008-09-01	731738000
2008-10-01	744082000
2008-11-01	705075000
2008-12-01	604686000