Quarterly Millions of US Dollars
1987-01-01 294
1987-04-01 319
1987-07-01 315
1987-10-01 419
1988-01-01 396
1988-04-01 356
1988-07-01 392
1988-10-01 442
1989-01-01 394
1989-04-01 444
1989-07-01 495
1989-10-01 530
1990-01-01 619
1990-04-01 702
1990-07-01 836
1990-10-01 836
1991-01-01 764
1991-04-01 767
1991-07-01 928
1991-10-01 1011
1992-01-01 1060
1992-04-01 1154
1992-07-01 1301
1992-10-01 1075
1993-01-01 1144
1993-04-01 1059
1993-07-01 1226
1993-10-01 1150
1994-01-01 1215
1994-04-01 1308
1994-07-01 1436
1994-10-01 1380
1995-01-01 1418
1995-04-01 1435
1995-07-01 1607
1995-10-01 1558
1996-01-01 1612
1996-04-01 1589
1996-07-01 1634
1996-10-01 1606
1997-01-01 1625
1997-04-01 1747
1997-07-01 1836
1997-10-01 1619
1998-01-01 1698
1998-04-01 1786
1998-07-01 1946
1998-10-01 1791
1999-01-01 1613
1999-04-01 1585
1999-07-01 1671
1999-10-01 1569
2000-01-01 1524
2000-04-01 1382
2000-07-01 1237
2000-10-01 1168
2001-01-01 1111
2001-04-01 1001
2001-07-01 1084
2001-10-01 1097
2002-01-01 1200
2002-04-01 1243
2002-07-01 1325
2002-10-01 1401
2003-01-01 1545
2003-04-01 1597
2003-07-01 1851
2003-10-01 1868
2004-01-01 2000
2004-04-01 1927
2004-07-01 2064
2004-10-01 2261
2005-01-01 2197
2005-04-01 1941
2005-07-01 2149
2005-10-01 2205
2006-01-01 1707
2006-04-01 1582
2006-07-01 1980
2006-10-01 1906
2007-01-01 1951
2007-04-01 2194
2007-07-01 2270
2007-10-01 2276
2008-01-01 1862
2008-04-01 2358
2008-07-01 2177
2008-10-01 2714
2009-01-01 2991
2009-04-01 2922
2009-07-01 3441
2009-10-01 3869
2010-01-01 3658
2010-04-01 5722
2010-07-01 6976
2010-10-01 6784
2011-01-01 7281
2011-04-01 7266
2011-07-01 6953
2011-10-01 7113
2012-01-01 6995
2012-04-01 7166
2012-07-01 7277
2012-10-01 7057
2013-01-01 7584
2013-04-01 7301
2013-07-01 7622
2013-10-01 7956
2014-01-01 7996
2014-04-01 7951
2014-07-01 7559
2014-10-01 7508
2015-01-01 7020
2015-04-01 7164
2015-07-01 7776
2015-10-01 7517
2016-01-01 7953
2016-04-01 7737
2016-07-01 8609
2016-10-01 8380
2017-01-01 8055
2017-04-01 8840
2017-07-01 8471
2017-10-01 8240
2018-01-01 8469