Quarter	Millions of US Dollars
1989-10-01	731903
1990-01-01	759840
1990-04-01	786541
1990-07-01	888440
1990-10-01	988532
1991-01-01	902979
1991-04-01	879391
1991-07-01	995485
1991-10-01	1128748
1992-01-01	1092200
1992-04-01	1203419
1992-07-01	1361955
1992-10-01	1252185
1993-01-01	1328181
1993-04-01	1311555
1993-07-01	1416669
1993-10-01	1392010
1994-01-01	1479848
1994-04-01	1576692
1994-07-01	1672870
1994-10-01	1728532
1995-01-01	1970282
1995-04-01	1997955
1995-07-01	1988512
1995-10-01	2006710
1996-01-01	2004864
1996-04-01	1981936
1996-07-01	2016251
1996-10-01	2018256
1997-01-01	1933593
1997-04-01	1905687
1997-07-01	1908568
1997-10-01	1897310
1998-01-01	1892770
1998-04-01	1982486
1998-07-01	2198009
1998-10-01	2220583
1999-01-01	2115719
1999-04-01	2085952
1999-07-01	2223835
1999-10-01	2127016
2000-01-01	2066921
2000-04-01	2122166
2000-07-01	1982512
2000-10-01	2120082
2001-01-01	2029343
2001-04-01	1958245
2001-07-01	2144803
2001-10-01	2087180
2002-01-01	2108815
2002-04-01	2455417
2002-07-01	2485444
2002-10-01	2622225
2003-01-01	2797219
2003-04-01	2961009
2003-07-01	3043266
2003-10-01	3330337
2004-01-01	3312511
2004-04-01	3359436
2004-07-01	3476354
2004-10-01	3808564
2005-01-01	3698485
2005-04-01	3543213
2005-07-01	3548105
2005-10-01	3457091
2006-01-01	3610863
2006-04-01	3844410
2006-07-01	3843732
2006-10-01	4021283
2007-01-01	4128817
2007-04-01	4238959
2007-07-01	4438591
2007-10-01	4657365
2008-01-01	5013404
2008-04-01	5033599
2008-07-01	4614818
2008-10-01	4575069
2009-01-01	4447112
2009-04-01	4785645
2009-07-01	4960138
2009-10-01	4809703
2010-01-01	4530807
2010-04-01	4130563
2010-07-01	4590093
2010-10-01	4490810
2011-01-01	4793832
2011-04-01	4910048
2011-07-01	4602451
2011-10-01	4382894
2012-01-01	4504776
2012-04-01	4242343
2012-07-01	4323232
2012-10-01	4355341
2013-01-01	4168228
2013-04-01	4208801
2013-07-01	4306782
2013-10-01	4356947
2014-01-01	4323053
2014-04-01	4286256
2014-07-01	3952866
2014-10-01	3779518
2015-01-01	3368388
2015-04-01	3468893
2015-07-01	3502782
2015-10-01	3320689
2016-01-01	3498617
2016-04-01	3430663
2016-07-01	3459782
2016-10-01	3237960
2017-01-01	3306002
2017-04-01	3533312
2017-07-01	3664254
2017-10-01	3711593
2018-01-01	3818300