Quarterly Millions of US Dollars
1987-01-01 74
1987-04-01 73
1987-07-01 72
1987-10-01 84
1988-01-01 81
1988-04-01 73
1988-07-01 71
1988-10-01 75
1989-01-01 70
1989-04-01 68
1989-07-01 71
1989-10-01 79
1990-01-01 79
1990-04-01 80
1990-07-01 85
1990-10-01 89
1991-01-01 78
1991-04-01 73
1991-07-01 80
1991-10-01 88
1992-01-01 81
1992-04-01 87
1992-07-01 94
1992-10-01 83
1993-01-01 83
1993-04-01 79
1993-07-01 82
1993-10-01 77
1994-01-01 80
1994-04-01 84
1994-07-01 87
1994-10-01 86
1995-01-01 97
1995-04-01 110
1995-07-01 107
1995-10-01 106
1996-01-01 103
1996-04-01 125
1996-07-01 98
1996-10-01 96
1997-01-01 15
1997-04-01 21
1997-07-01 28
1997-10-01 28
1998-01-01 27
1998-04-01 27
1998-07-01 29
1998-10-01 29
1999-01-01 48
1999-04-01 45
1999-07-01 46
1999-10-01 44
2000-01-01 42
2000-04-01 39
2000-07-01 36
2000-10-01 38
2001-01-01 33
2001-04-01 30
2001-07-01 33
2001-10-01 32
2002-01-01 29
2002-04-01 34
2002-07-01 34
2002-10-01 38
2003-01-01 40
2003-04-01 40
2003-07-01 41
2003-10-01 270
2004-01-01 272
2004-04-01 251
2004-07-01 260
2004-10-01 360
2005-01-01 355
2005-04-01 345
2005-07-01 345
2005-10-01 333
2006-01-01 326
2006-04-01 340
2006-07-01 6801
2006-10-01 6765
2007-01-01 6841
2007-04-01 6937
2007-07-01 7283
2007-10-01 7562
2008-01-01 20987
2008-04-01 21742
2008-07-01 29385
2008-10-01 28044
2009-01-01 29560
2009-04-01 24362
2009-07-01 30774
2009-10-01 23029
2010-01-01 26061
2010-04-01 20195
2010-07-01 25808
2010-10-01 22668
2011-01-01 17259
2011-04-01 17518
2011-07-01 19110
2011-10-01 25412
2012-01-01 27911
2012-04-01 23410
2012-07-01 24041
2012-10-01 31475
2013-01-01 24911
2013-04-01 28539
2013-07-01 31775
2013-10-01 17741
2014-01-01 18484
2014-04-01 28272
2014-07-01 25887
2014-10-01 14169
2015-01-01 12556
2015-04-01 15838
2015-07-01 21722
2015-10-01 13535
2016-01-01 13286
2016-04-01 12956
2016-07-01 7329
2016-10-01 8297
2017-01-01 7021
2017-04-01 10509
2017-07-01 10768
2017-10-01 7976
2018-01-01 8191
2018-04-01 12852