Quarter	Millions of US Dollars
1989-10-01	80757
1990-01-01	83887
1990-04-01	90612
1990-07-01	100437
1990-10-01	105562
1991-01-01	102255
1991-04-01	99385
1991-07-01	108959
1991-10-01	118766
1992-01-01	111730
1992-04-01	122694
1992-07-01	133997
1992-10-01	126109
1993-01-01	131464
1993-04-01	132026
1993-07-01	141239
1993-10-01	142366
1994-01-01	152551
1994-04-01	162083
1994-07-01	173313
1994-10-01	177909
1995-01-01	202353
1995-04-01	210812
1995-07-01	213341
1995-10-01	215614
1996-01-01	222553
1996-04-01	225728
1996-07-01	230149
1996-10-01	230783
1997-01-01	227730
1997-04-01	230961
1997-07-01	236104
1997-10-01	245984
1998-01-01	259400
1998-04-01	278754
1998-07-01	301221
1998-10-01	301937
1999-01-01	313808
1999-04-01	348227
1999-07-01	381770
1999-10-01	377220
2000-01-01	371950
2000-04-01	384719
2000-07-01	386517
2000-10-01	420600
2001-01-01	421979
2001-04-01	431045
2001-07-01	472855
2001-10-01	488447
2002-01-01	500377
2002-04-01	574789
2002-07-01	571838
2002-10-01	636127
2003-01-01	718121
2003-04-01	794780
2003-07-01	840201
2003-10-01	938367
2004-01-01	928196
2004-04-01	941898
2004-07-01	957032
2004-10-01	1074473
2005-01-01	1059713
2005-04-01	1034231
2005-07-01	1042341
2005-10-01	1058079
2006-01-01	1102628
2006-04-01	1187320
2006-07-01	1206915
2006-10-01	1309051
2007-01-01	1414994
2007-04-01	1452635
2007-07-01	1550738
2007-10-01	1695027
2008-01-01	1817479
2008-04-01	1876623
2008-07-01	1744139
2008-10-01	1735263
2009-01-01	1746204
2009-04-01	1890854
2009-07-01	1952104
2009-10-01	1931078
2010-01-01	1858513
2010-04-01	1680345
2010-07-01	1875950
2010-10-01	1868862
2011-01-01	1961977
2011-04-01	2023757
2011-07-01	1890755
2011-10-01	1809015
2012-01-01	1889832
2012-04-01	1762983
2012-07-01	1788504
2012-10-01	1846764
2013-01-01	1778011
2013-04-01	1799678
2013-07-01	1843775
2013-10-01	1826201
2014-01-01	1849651
2014-04-01	1851534
2014-07-01	1666928
2014-10-01	1684577
2015-01-01	1556013
2015-04-01	1638173
2015-07-01	1631132
2015-10-01	1566229
2016-01-01	1621051
2016-04-01	1618403
2016-07-01	1654317
2016-10-01	1545784
2017-01-01	1607686
2017-04-01	1657599
2017-07-01	1696804
2017-10-01	1678821
2018-01-01	1744476