Quarterly US dollars
1986-09-30 53042
1986-12-31 55171
1987-03-31 63932
1987-06-30 68112
1987-09-30 78680
1987-12-31 96500
1988-03-31 96610
1988-06-30 92360
1988-09-30 106452
1988-12-31 102951
1989-03-31 103502
1989-06-30 96256
1989-09-30 105751
1989-12-31 106352
1990-03-31 103061
1990-06-30 103121
1990-09-30 120610
1990-12-31 120841
1991-03-31 104608
1991-06-30 101265
1991-09-30 104306
1991-12-31 98955
1992-03-31 89355
1992-06-30 82586
1992-09-30 82634
1992-12-31 67199
1993-03-31 69845
1993-06-30 65548
1993-09-30 68608
1993-12-31 63395
1994-03-31 72607
1994-06-30 71297
1994-09-30 80334
1994-12-31 79297
1995-03-31 103697
1995-06-30 95884
1995-09-30 101437
1995-12-31 105835
1996-03-31 94760
1996-06-30 99997
1996-09-30 106943
1996-12-31 117055
1997-03-31 120807
1997-06-30 144126
1997-09-30 127836
1997-12-31 165747
1998-03-31 139757
1998-06-30 146351
1998-09-30 168472
1998-12-31 221804
1999-03-31 168658
1999-06-30 147015
1999-09-30 178722
1999-12-31 192675
2000-03-31 190360
2000-06-30 200565
2000-09-30 201267
2000-12-31 198873
2001-03-31 151810
2001-06-30 155729
2001-09-30 159496
2001-12-31 145692
2002-03-31 137956
2002-06-30 163994
2002-09-30 165637
2002-12-31 175069
2003-03-31 169258
2003-06-30 174559
2003-09-30 181476
2003-12-31 197433
2004-03-31 202472
2004-06-30 209873
2004-09-30 212498
2004-12-31 243229
2005-03-31 204910
2005-06-30 212044
2005-09-30 182356
2005-12-31 170196
2006-03-31 159096
2006-06-30 152457
2006-09-30 149671
2006-12-31 157214
2007-03-31 170693
2007-06-30 159888
2007-09-30 202854
2007-12-31 236933
2008-03-31 333251
2008-06-30 239087
2008-09-30 265216
2008-12-31 215403
2009-03-31 165442
2009-06-30 190520
2009-09-30 210849
2009-12-31 162682
2010-03-31 168973
2010-06-30 176821
2010-09-30 205449
2010-12-31 221445
2011-03-31 192820
2011-06-30 189815
2011-09-30 256780
2011-12-31 265086
2012-03-31 250048
2012-06-30 254067
2012-09-30 236406
2012-12-31 204732
2013-03-31 210986
2013-06-30 201140
2013-09-30 216882
2013-12-31 197504
2014-03-31 194859
2014-06-30 215472
2014-09-30 196594
2014-12-31 198640
2015-03-31 165332
2015-06-30 163809
2015-09-30 162148
2015-12-31 168996