Quarterly Millions of US Dollars
1987-04-01 2490
1987-07-01 2692
1987-10-01 903
1988-01-01 1294
1988-04-01 2039
1988-07-01 3357
1988-10-01 5461
1989-01-01 5246
1989-04-01 14106
1989-07-01 14866
1989-10-01 13552
1990-01-01 19528
1990-04-01 17390
1990-07-01 16726
1990-10-01 10944
1991-01-01 9790
1991-04-01 13693
1991-07-01 11976
1991-10-01 11885
1992-01-01 10533
1992-04-01 13673
1992-07-01 16399
1992-10-01 18281
1993-01-01 18296
1993-04-01 20512
1993-07-01 15082
1993-10-01 13622
1994-01-01 12578
1994-04-01 10985
1994-07-01 14018
1994-10-01 16757
1995-01-01 16097
1995-04-01 17300
1995-07-01 15774
1995-10-01 17596
1996-01-01 15904
1996-04-01 15394
1996-07-01 14546
1996-10-01 14765
1997-01-01 15056
1997-04-01 14187
1997-07-01 17245
1997-10-01 20205
1998-01-01 18771
1998-04-01 18720
1998-07-01 20179
1998-10-01 19267
1999-01-01 16782
1999-04-01 13830
1999-07-01 13039
1999-10-01 15193
2000-01-01 13684
2000-04-01 14846
2000-07-01 15162
2000-10-01 17679
2001-01-01 17332
2001-04-01 16170
2001-07-01 15933
2001-10-01 15109
2002-01-01 15532
2002-04-01 16977
2002-07-01 16769
2002-10-01 18093
2003-01-01 17543
2003-04-01 18842
2003-07-01 20841
2003-10-01 25298
2004-01-01 27332
2004-04-01 28978
2004-07-01 29647
2004-10-01 34938
2005-01-01 34231
2005-04-01 36882
2005-07-01 34412
2005-10-01 35921
2006-01-01 38363
2006-04-01 40512
2006-07-01 37417
2006-10-01 38905
2007-01-01 38140
2007-04-01 38285
2007-07-01 35932
2007-10-01 35188
2008-01-01 37569
2008-04-01 38998
2008-07-01 36318
2008-10-01 32398
2009-01-01 28167
2009-04-01 29120
2009-07-01 28910
2009-10-01 30783
2010-01-01 30488
2010-04-01 31682
2010-07-01 31270
2010-10-01 36054
2011-01-01 36040
2011-04-01 38517
2011-07-01 37689
2011-10-01 38687
2012-01-01 39029
2012-04-01 40565
2012-07-01 41452
2012-10-01 43143
2013-01-01 41760
2013-04-01 41870
2013-07-01 41991
2013-10-01 42325
2014-01-01 41031
2014-04-01 44951
2014-07-01 43683
2014-10-01 46547
2015-01-01 47547
2015-04-01 48089
2015-07-01 47163
2015-10-01 46342
2016-01-01 46647
2016-04-01 49002
2016-07-01 49077
2016-10-01 46538
2017-01-01 51543
2017-04-01 52523
2017-07-01 53773
2017-10-01 55429
2018-01-01 57372