Quarterly US dollars
1986-09-30 4565
1986-12-31 4753
1987-03-31 5849
1987-06-30 5210
1987-09-30 5822
1987-12-31 9425
1988-03-31 10242
1988-06-30 10687
1988-09-30 10528
1988-12-31 12705
1989-03-31 14134
1989-06-30 11723
1989-09-30 12974
1989-12-31 11772
1990-03-31 12454
1990-06-30 15382
1990-09-30 15958
1990-12-31 17806
1991-03-31 13461
1991-06-30 12086
1991-09-30 11806
1991-12-31 12090
1992-03-31 10269
1992-06-30 10445
1992-09-30 13658
1992-12-31 8630
1993-03-31 10582
1993-06-30 8620
1993-09-30 10372
1993-12-31 13124
1994-03-31 7630
1994-06-30 10833
1994-09-30 12012
1994-12-31 11040
1995-03-31 9132
1995-06-30 13268
1995-09-30 12907
1995-12-31 14045
1996-03-31 8710
1996-06-30 12339
1996-09-30 10660
1996-12-31 9906
1997-03-31 12460
1997-06-30 9707
1997-09-30 8511
1997-12-31 12434
1998-03-31 10692
1998-06-30 10593
1998-09-30 11739
1998-12-31 12081
1999-03-31 8649
1999-06-30 8418
1999-09-30 8144
1999-12-31 8466
2000-03-31 9749
2000-06-30 8884
2000-09-30 11754
2000-12-31 10572
2001-03-31 12450
2001-06-30 12457
2001-09-30 11744
2001-12-31 11211
2002-03-31 10739
2002-06-30 12818
2002-09-30 14256
2002-12-31 15483
2003-03-31 19192
2003-06-30 22228
2003-09-30 24385
2003-12-31 29173
2004-03-31 34605
2004-06-30 37798
2004-09-30 42839
2004-12-31 43433
2005-03-31 50766
2005-06-30 50365
2005-09-30 54690
2005-12-31 78808
2006-03-31 93095
2006-06-30 87374
2006-09-30 71698
2006-12-31 83667
2007-03-31 89553
2007-06-30 75257
2007-09-30 83419
2007-12-31 110924
2008-03-31 106495
2008-06-30 96780
2008-09-30 98174
2008-12-31 42272
2009-03-31 42951
2009-06-30 47742
2009-09-30 51742
2009-12-31 49247
2010-03-31 48744
2010-06-30 45648
2010-09-30 43184
2010-12-31 48377
2011-03-31 57067
2011-06-30 53263
2011-09-30 47802
2011-12-31 47252
2012-03-31 61880
2012-06-30 48470
2012-09-30 60042
2012-12-31 51771
2013-03-31 52904
2013-06-30 51999
2013-09-30 56371
2013-12-31 77053
2014-03-31 87496
2014-06-30 88545
2014-09-30 76532
2014-12-31 79431
2015-03-31 68271
2015-06-30 75965
2015-09-30 72369
2015-12-31 75000