Quarter	Millions of US Dollars
1989-10-01	360994
1990-01-01	393427
1990-04-01	408563
1990-07-01	446060
1990-10-01	522119
1991-01-01	487886
1991-04-01	478696
1991-07-01	523371
1991-10-01	586514
1992-01-01	567725
1992-04-01	628138
1992-07-01	701830
1992-10-01	617635
1993-01-01	661116
1993-04-01	625111
1993-07-01	628626
1993-10-01	604517
1994-01-01	624122
1994-04-01	635955
1994-07-01	649341
1994-10-01	647296
1995-01-01	723808
1995-04-01	705748
1995-07-01	689642
1995-10-01	685039
1996-01-01	662563
1996-04-01	634327
1996-07-01	628647
1996-10-01	609270
1997-01-01	567627
1997-04-01	547061
1997-07-01	545011
1997-10-01	530986
1998-01-01	513811
1998-04-01	512460
1998-07-01	546327
1998-10-01	542232
1999-01-01	516025
1999-04-01	497528
1999-07-01	523897
1999-10-01	507641
2000-01-01	490132
2000-04-01	494003
2000-07-01	473233
2000-10-01	491537
2001-01-01	489542
2001-04-01	482474
2001-07-01	515689
2001-10-01	505802
2002-01-01	541077
2002-04-01	631139
2002-07-01	607270
2002-10-01	641702
2003-01-01	685501
2003-04-01	720801
2003-07-01	743517
2003-10-01	808068
2004-01-01	805007
2004-04-01	813435
2004-07-01	838930
2004-10-01	967577
2005-01-01	931128
2005-04-01	897999
2005-07-01	904669
2005-10-01	915442
2006-01-01	973316
2006-04-01	1046101
2006-07-01	1073797
2006-10-01	1186686
2007-01-01	1248558
2007-04-01	1320305
2007-07-01	1453102
2007-10-01	1618839
2008-01-01	1776904
2008-04-01	1818670
2008-07-01	1700410
2008-10-01	1772962
2009-01-01	1740516
2009-04-01	1878243
2009-07-01	1881182
2009-10-01	1843051
2010-01-01	1802258
2010-04-01	1671222
2010-07-01	1863766
2010-10-01	1816788
2011-01-01	1951492
2011-04-01	2010718
2011-07-01	1951750
2011-10-01	1929275
2012-01-01	2020541
2012-04-01	1871115
2012-07-01	1886442
2012-10-01	1865767
2013-01-01	1788247
2013-04-01	1812964
2013-07-01	1847363
2013-10-01	1850921
2014-01-01	1886159
2014-04-01	1910863
2014-07-01	1774360
2014-10-01	1667659
2015-01-01	1511114
2015-04-01	1526398
2015-07-01	1488523
2015-10-01	1450946
2016-01-01	1510278
2016-04-01	1481645
2016-07-01	1490970
2016-10-01	1406361
2017-01-01	1425976
2017-04-01	1523535
2017-07-01	1589122
2017-10-01	1618182
2018-01-01	1690253