Quarterly US dollars
1986-09-30 5791
1986-12-31 6831
1987-03-31 8469
1987-06-30 10316
1987-09-30 12527
1987-12-31 16293
1988-03-31 16794
1988-06-30 16057
1988-09-30 16673
1988-12-31 18819
1989-03-31 18554
1989-06-30 16388
1989-09-30 20941
1989-12-31 18253
1990-03-31 16045
1990-06-30 16125
1990-09-30 11480
1990-12-31 10203
1991-03-31 9321
1991-06-30 9789
1991-09-30 9124
1991-12-31 7286
1992-03-31 6630
1992-06-30 8024
1992-09-30 8537
1992-12-31 7570
1993-03-31 9415
1993-06-30 10234
1993-09-30 9362
1993-12-31 9308
1994-03-31 12251
1994-06-30 10625
1994-09-30 13133
1994-12-31 12543
1995-03-31 25561
1995-06-30 25180
1995-09-30 21845
1995-12-31 20900
1996-03-31 18086
1996-06-30 18037
1996-09-30 23506
1996-12-31 26621
1997-03-31 27303
1997-06-30 34788
1997-09-30 27886
1997-12-31 45214
1998-03-31 42048
1998-06-30 48409
1998-09-30 62038
1998-12-31 74727
1999-03-31 57927
1999-06-30 60338
1999-09-30 70298
1999-12-31 69818
2000-03-31 66469
2000-06-30 70585
2000-09-30 72745
2000-12-31 50630
2001-03-31 49787
2001-06-30 58577
2001-09-30 61992
2001-12-31 62909
2002-03-31 62347
2002-06-30 75074
2002-09-30 82600
2002-12-31 72327
2003-03-31 91031
2003-06-30 85469
2003-09-30 106747
2003-12-31 102374
2004-03-31 103546
2004-06-30 106510
2004-09-30 119962
2004-12-31 133595
2005-03-31 119832
2005-06-30 121776
2005-09-30 98545
2005-12-31 96885
2006-03-31 96528
2006-06-30 91433
2006-09-30 84731
2006-12-31 107812
2007-03-31 109783
2007-06-30 103270
2007-09-30 140786
2007-12-31 148407
2008-03-31 229717
2008-06-30 145685
2008-09-30 173763
2008-12-31 113591
2009-03-31 81223
2009-06-30 86875
2009-09-30 82699
2009-12-31 72308
2010-03-31 67037
2010-06-30 63642
2010-09-30 72421
2010-12-31 83264
2011-03-31 77589
2011-06-30 86331
2011-09-30 123484
2011-12-31 150249
2012-03-31 136719
2012-06-30 129029
2012-09-30 122035
2012-12-31 105973
2013-03-31 106635
2013-06-30 118661
2013-09-30 120861
2013-12-31 120684
2014-03-31 120267
2014-06-30 124475
2014-09-30 111134
2014-12-31 112431
2015-03-31 94675
2015-06-30 88077
2015-09-30 91842
2015-12-31 88307