Quarter	Millions of US Dollars
1989-10-01	449820
1990-01-01	473388
1990-04-01	487040
1990-07-01	541532
1990-10-01	601543
1991-01-01	551993
1991-04-01	540935
1991-07-01	608070
1991-10-01	685395
1992-01-01	659722
1992-04-01	720439
1992-07-01	805242
1992-10-01	715921
1993-01-01	746718
1993-04-01	728429
1993-07-01	785239
1993-10-01	758575
1994-01-01	804949
1994-04-01	857725
1994-07-01	906389
1994-10-01	924884
1995-01-01	1057622
1995-04-01	1082012
1995-07-01	1091731
1995-10-01	1120711
1996-01-01	1137948
1996-04-01	1127347
1996-07-01	1153819
1996-10-01	1159639
1997-01-01	1120385
1997-04-01	1103425
1997-07-01	1119548
1997-10-01	1111891
1998-01-01	1118916
1998-04-01	1182049
1998-07-01	1328530
1998-10-01	1344992
1999-01-01	1293237
1999-04-01	1292345
1999-07-01	1387509
1999-10-01	1328976
2000-01-01	1298637
2000-04-01	1345187
2000-07-01	1263419
2000-10-01	1345246
2001-01-01	1308180
2001-04-01	1259842
2001-07-01	1370589
2001-10-01	1327787
2002-01-01	1344289
2002-04-01	1552434
2002-07-01	1560247
2002-10-01	1639088
2003-01-01	1724044
2003-04-01	1815952
2003-07-01	1866041
2003-10-01	2025645
2004-01-01	2010892
2004-04-01	2039985
2004-07-01	2110798
2004-10-01	2296058
2005-01-01	2232078
2005-04-01	2153780
2005-07-01	2147598
2005-10-01	2066253
2006-01-01	2162279
2006-04-01	2292470
2006-07-01	2286876
2006-10-01	2388437
2007-01-01	2474030
2007-04-01	2525214
2007-07-01	2659560
2007-10-01	2766093
2008-01-01	2980794
2008-04-01	3003761
2008-07-01	2751269
2008-10-01	2737585
2009-01-01	2652286
2009-04-01	2806373
2009-07-01	2903145
2009-10-01	2764359
2010-01-01	2572150
2010-04-01	2310417
2010-07-01	2545948
2010-10-01	2282863
2011-01-01	2502286
2011-04-01	2498157
2011-07-01	2317665
2011-10-01	2174739
2012-01-01	2195932
2012-04-01	2009506
2012-07-01	2025350
2012-10-01	2027386
2013-01-01	1924568
2013-04-01	1922218
2013-07-01	1943072
2013-10-01	1927393
2014-01-01	1896777
2014-04-01	1873089
2014-07-01	1720432
2014-10-01	1624876
2015-01-01	1471189
2015-04-01	1494488
2015-07-01	1517262
2015-10-01	1394308
2016-01-01	1479383
2016-04-01	1453813
2016-07-01	1457185
2016-10-01	1356392
2017-01-01	1407725
2017-04-01	1505411
2017-07-01	1543024
2017-10-01	1549860
2018-01-01	1644249