Quarter	Millions of US Dollars
1966-01-01	15
1966-04-01	15
1966-07-01	15
1966-10-01	15
1967-01-01	15
1967-04-01	15
1967-07-01	15
1967-10-01	15
1968-01-01	125
1968-04-01	185
1968-07-01	205
1968-10-01	205
1969-01-01	205
1969-04-01	205
1969-07-01	205
1969-10-01	212
1970-01-01	212
1970-04-01	212
1970-07-01	212
1970-10-01	212
1971-01-01	212
1971-04-01	212
1971-07-01	212
1971-10-01	212
1972-01-01	212
1972-04-01	212
1972-07-01	239
1972-10-01	239
1973-01-01	243
1973-04-01	247
1973-07-01	246
1973-10-01	243
1974-01-01	246
1974-04-01	246
1974-07-01	246
1974-10-01	252
1975-01-01	252
1975-04-01	252
1975-07-01	249
1975-10-01	266
1976-01-01	267
1976-04-01	268
1976-07-01	268
1976-10-01	268
1977-01-01	292
1977-04-01	293
1977-07-01	295
1977-10-01	394
1978-01-01	400
1978-04-01	399
1978-07-01	700
1978-10-01	727
1979-01-01	796
1979-04-01	801
1979-07-01	826
1979-10-01	823
1980-01-01	775
1980-04-01	816
1980-07-01	807
1980-10-01	764
1981-01-01	739
1981-04-01	707
1981-07-01	716
1981-10-01	735
1982-01-01	713
1982-04-01	698
1982-07-01	690
1982-10-01	711
1983-01-01	731
1983-04-01	800
1983-07-01	891
1983-10-01	1079
1984-01-01	1070
1984-04-01	1089
1984-07-01	1082
1984-10-01	1212
1985-01-01	1376
1985-04-01	1694
1985-07-01	2253
1985-10-01	2563
1986-01-01	3142
1986-04-01	3908
1986-07-01	4582
1986-10-01	4745
1987-01-01	6268
1987-04-01	6548
1987-07-01	7608
1987-10-01	9310
1988-01-01	9676
1988-04-01	10166
1988-07-01	10717
1988-10-01	11662
1989-01-01	12601
1989-04-01	13628
1989-07-01	15104
1989-10-01	16598
1990-01-01	17719
1990-04-01	19217
1990-07-01	21600
1990-10-01	22042
1991-01-01	22115
1991-04-01	22773
1991-07-01	23669
1991-10-01	25621
1992-01-01	26702
1992-04-01	29067
1992-07-01	31353
1992-10-01	29144
1993-01-01	29697
1993-04-01	30329
1993-07-01	38492
1993-10-01	42578
1994-01-01	46824
1994-04-01	52833
1994-07-01	56277
1994-10-01	59912
1995-01-01	65230
1995-04-01	72466
1995-07-01	76299
1995-10-01	79859
1996-01-01	87910
1996-04-01	98080
1996-07-01	101879
1996-10-01	118776
1997-01-01	124698
1997-04-01	134077
1997-07-01	153685
1997-10-01	170639
1998-01-01	182034
1998-04-01	199048
1998-07-01	216218
1998-10-01	227969
1999-01-01	233029
1999-04-01	247883
1999-07-01	269884
1999-10-01	280983
2000-01-01	298741
2000-04-01	306912
2000-07-01	318366
2000-10-01	337142
2001-01-01	351130
2001-04-01	364071
2001-07-01	390197
2001-10-01	392033
2002-01-01	396045
2002-04-01	441726
2002-07-01	441821
2002-10-01	454633
2003-01-01	461940
2003-04-01	468114
2003-07-01	477646
2003-10-01	497438
2004-01-01	496187
2004-04-01	488135
2004-07-01	495055
2004-10-01	528011
2005-01-01	519275
2005-04-01	502803
2005-07-01	513770
2005-10-01	544684
2006-01-01	604458
2006-04-01	669182
2006-07-01	742253
2006-10-01	878714
2007-01-01	985811
2007-04-01	1093512
2007-07-01	1157363
2007-10-01	1188196
2008-01-01	1204439
2008-04-01	1195178
2008-07-01	1159406
2008-10-01	1144276
2009-01-01	1114237
2009-04-01	1141323
2009-07-01	1158247
2009-10-01	1147858
2010-01-01	1135775
2010-04-01	1118446
2010-07-01	1148851
2010-10-01	1155824
2011-01-01	1158629
2011-04-01	1154773
2011-07-01	1142143
2011-10-01	1142586
2012-01-01	1162194
2012-04-01	1162740
2012-07-01	1183150
2012-10-01	1206010
2013-01-01	1205527
2013-04-01	1224936
2013-07-01	1234965
2013-10-01	1250947
2014-01-01	1264900
2014-04-01	1301112
2014-07-01	1302587
2014-10-01	1303138
2015-01-01	1304639
2015-04-01	1329340
2015-07-01	1335567
2015-10-01	1329289
2016-01-01	1338440
2016-04-01	1358581
2016-07-01	1355232
2016-10-01	1349053
2017-01-01	1364529
2017-04-01	1417031
2017-07-01	1450647
2017-10-01	1503192
2018-01-01	1557886
2018-04-01	1611269