Quarterly Millions of US Dollars
1987-10-01 190
1988-01-01 181
1988-04-01 165
1988-07-01 160
1988-10-01 169
1989-01-01 159
1989-04-01 154
1989-07-01 161
1989-10-01 177
1990-01-01 177
1990-04-01 180
1990-07-01 192
1990-10-01 200
1991-01-01 175
1991-04-01 166
1991-07-01 180
1991-10-01 198
1992-01-01 183
1992-04-01 196
1992-07-01 213
1993-07-01 285
1993-10-01 568
1994-01-01 1592
1994-04-01 1603
1994-07-01 2214
1994-10-01 2203
1995-01-01 2332
1995-04-01 2361
1995-07-01 2211
1995-10-01 2560
1996-01-01 2921
1996-04-01 2884
1996-07-01 3865
1996-10-01 3817
1997-01-01 3752
1997-04-01 4123
1997-07-01 4056
1997-10-01 4478
1998-01-01 4450
1998-04-01 4413
1998-07-01 4237
1998-10-01 5377
1999-01-01 5315
1999-04-01 5291
1999-07-01 5135
1999-10-01 5141
2000-01-01 5123
2000-04-01 5109
2000-07-01 5347
2000-10-01 5308
2001-01-01 5223
2001-04-01 6688
2001-07-01 6073
2001-10-01 5974
2002-01-01 5958
2002-04-01 5893
2002-07-01 5866
2002-10-01 5267
2003-01-01 4990
2003-04-01 5011
2003-07-01 5074
2003-10-01 6354
2004-01-01 5335
2004-04-01 5297
2004-07-01 5041
2004-10-01 7046
2005-01-01 6903
2005-04-01 6719
2005-07-01 6437
2005-10-01 6385
2006-01-01 6445
2006-04-01 5867
2006-07-01 5557
2006-10-01 5628
2007-01-01 5649
2007-04-01 5672
2007-07-01 5772
2007-10-01 5850
2008-01-01 6014
2008-04-01 6002
2008-07-01 5797
2008-10-01 4202
2009-01-01 4132
2009-04-01 4218
2009-07-01 4276
2009-10-01 3749
2010-01-01 3655
2010-04-01 3540
2010-07-01 3685
2010-10-01 4871
2011-01-01 4963
2011-04-01 4007
2011-07-01 7066
2011-10-01 7064
2012-01-01 7105
2012-04-01 13049
2012-07-01 14078
2012-10-01 13710
2013-01-01 13686
2013-04-01 13851
2013-07-01 14745
2013-10-01 15219
2014-01-01 14860
2014-04-01 16576
2014-07-01 14741
2014-10-01 15267
2015-01-01 15282
2015-04-01 12847
2015-07-01 12539
2015-10-01 12603
2016-01-01 12663
2016-04-01 12776
2016-07-01 13324
2016-10-01 14834
2017-01-01 14967
2017-04-01 13576
2017-07-01 13833
2017-10-01 16716
2018-01-01 17234
2018-04-01 16476