Quarterly Billions of US Dollars
1987-01-01 0.110
1987-04-01 0.139
1987-07-01 0.130
1987-10-01 0.400
1988-01-01 0.374
1988-04-01 0.291
1988-07-01 0.287
1988-10-01 0.109
1989-01-01 0.151
1989-04-01 0.062
1989-07-01 0.114
1989-10-01 0.152
1990-01-01 0.207
1990-04-01 0.305
1990-07-01 0.666
1990-10-01 0.490
1991-01-01 0.416
1991-04-01 0.350
1991-07-01 0.459
1991-10-01 0.208
1992-01-01 0.197
1992-04-01 0.104
1992-07-01 0.194
1992-10-01 0.052
1993-01-01 0.121
1993-04-01 0.179
1993-07-01 0.209
1993-10-01 0.163
1994-01-01 0.092
1994-04-01 0.146
1994-07-01 0.173
1994-10-01 0.192
1995-01-01 0.594
1995-04-01 0.406
1995-07-01 0.336
1995-10-01 0.421
1996-01-01 2.013
1996-04-01 2.018
1996-07-01 1.949
1996-10-01 1.744
1997-01-01 2.925
1997-04-01 4.624
1997-07-01 6.340
1997-10-01 6.526
1998-01-01 7.436
1998-04-01 8.124
1998-07-01 11.684
1998-10-01 11.741
1999-01-01 15.952
1999-04-01 16.736
1999-07-01 16.819
1999-10-01 18.985
2000-01-01 19.159
2000-04-01 21.948
2000-07-01 19.357
2000-10-01 23.204
2001-01-01 24.935
2001-04-01 27.959
2001-07-01 26.571
2001-10-01 29.851
2002-01-01 31.234
2002-04-01 33.493
2002-07-01 32.026
2002-10-01 34.081
2003-01-01 39.051
2003-04-01 43.814
2003-07-01 40.709
2003-10-01 44.100
2004-01-01 51.875
2004-04-01 51.301
2004-07-01 57.627
2004-10-01 74.477
2005-01-01 76.966
2005-04-01 74.591
2005-07-01 79.754
2005-10-01 89.193
2006-01-01 94.195
2006-04-01 94.747
2006-07-01 102.378
2006-10-01 114.899
2007-01-01 136.176
2007-04-01 135.964
2007-07-01 148.648
2007-10-01 140.981
2008-01-01 154.695
2008-04-01 163.762
2008-07-01 151.647
2008-10-01 123.068
2009-01-01 109.895
2009-04-01 104.052
2009-07-01 113.896
2009-10-01 99.200
2010-01-01 87.781
2010-04-01 80.368
2010-07-01 81.997
2010-10-01 79.827
2011-01-01 55.720
2011-04-01 50.617
2011-07-01 40.698
2011-10-01 40.474
2012-01-01 75.961
2012-04-01 82.971
2012-07-01 72.176
2012-10-01 77.019
2013-01-01 71.084
2013-04-01 65.713
2013-07-01 66.503
2013-10-01 61.889
2014-01-01 27.105
2014-04-01 27.082
2014-07-01 28.084
2014-10-01 28.530
2015-01-01 26.247
2015-04-01 26.936