Quarter	Millions of US Dollars
1989-10-01	737122
1990-01-01	770890
1990-04-01	820394
1990-07-01	880335
1990-10-01	962325
1991-01-01	883503
1991-04-01	867062
1991-07-01	970292
1991-10-01	1084030
1992-01-01	1045589
1992-04-01	1167194
1992-07-01	1100293
1992-10-01	950244
1993-01-01	909225
1993-04-01	972526
1993-07-01	966449
1993-10-01	927606
1994-01-01	1013186
1994-04-01	1055737
1994-07-01	1096225
1994-10-01	1132426
1995-01-01	1103845
1995-04-01	1166793
1995-07-01	1197706
1995-10-01	1231041
1996-01-01	1226349
1996-04-01	1281863
1996-07-01	1312372
1996-10-01	1316990
1997-01-01	1217028
1997-04-01	1205779
1997-07-01	1196734
1997-10-01	1165173
1998-01-01	1135206
1998-04-01	1179516
1998-07-01	1275870
1998-10-01	1261403
1999-01-01	1178144
1999-04-01	1154458
1999-07-01	1193322
1999-10-01	1102509
2000-01-01	1068202
2000-04-01	1087115
2000-07-01	1000738
2000-10-01	1040493
2001-01-01	1019588
2001-04-01	994895
2001-07-01	1059295
2001-10-01	1015751
2002-01-01	1043052
2002-04-01	1197358
2002-07-01	1187695
2002-10-01	1209091
2003-01-01	1293072
2003-04-01	1362617
2003-07-01	1410784
2003-10-01	1470986
2004-01-01	1482129
2004-04-01	1509561
2004-07-01	1547424
2004-10-01	1637209
2005-01-01	1636066
2005-04-01	1565455
2005-07-01	1537427
2005-10-01	1468542
2006-01-01	1544988
2006-04-01	1666971
2006-07-01	1657195
2006-10-01	1689940
2007-01-01	1747365
2007-04-01	1811150
2007-07-01	1900877
2007-10-01	1928089
2008-01-01	2147500
2008-04-01	2138308
2008-07-01	1954358
2008-10-01	1920325
2009-01-01	1937516
2009-04-01	2061313
2009-07-01	2196824
2009-10-01	2114093
2010-01-01	2033512
2010-04-01	1881334
2010-07-01	2117074
2010-10-01	2069154
2011-01-01	2233377
2011-04-01	2312242
2011-07-01	2147474
2011-10-01	2077534
2012-01-01	2187116
2012-04-01	2087874
2012-07-01	2158752
2012-10-01	2182837
2013-01-01	2179300
2013-04-01	2277018
2013-07-01	2345767
2013-10-01	2391501
2014-01-01	2456299
2014-04-01	2496002
2014-07-01	2270346
2014-10-01	2181465
2015-01-01	1989154
2015-04-01	2081814
2015-07-01	2077462
2015-10-01	1985247
2016-01-01	2144165
2016-04-01	2120048
2016-07-01	2090158
2016-10-01	1974590
2017-01-01	2043778
2017-04-01	2196972
2017-07-01	2275807
2017-10-01	2291784
2018-01-01	2392790