Quarterly US dollars
1986-09-30 550
1986-12-31 687
1987-03-31 777
1987-06-30 932
1987-09-30 828
1987-12-31 1048
1988-03-31 1195
1988-06-30 1138
1988-09-30 1206
1988-12-31 1267
1989-03-31 1307
1989-06-30 1199
1989-09-30 1462
1989-12-31 1428
1990-03-31 1403
1990-06-30 1275
1990-09-30 1448
1990-12-31 1393
1991-03-31 1219
1991-06-30 1075
1991-09-30 1126
1991-12-31 1301
1992-03-31 1152
1992-06-30 1094
1992-09-30 2923
1992-12-31 2350
1993-03-31 4517
1993-06-30 2950
1993-09-30 6678
1993-12-31 11602
1994-03-31 911
1994-06-30 4798
1994-09-30 6694
1994-12-31 6247
1995-03-31 1318
1995-06-30 7276
1995-09-30 7085
1995-12-31 8057
1996-03-31 203
1996-06-30 4348
1996-09-30 3097
1996-12-31 1643
1997-03-31 4054
1997-06-30 282
1997-09-30 427
1997-12-31 329
1998-03-31 364
1998-06-30 72
1998-09-30 89
1998-12-31 109
1999-03-31 166
1999-06-30 668
1999-09-30 234
1999-12-31 377
2000-03-31 338
2000-06-30 172
2000-09-30 880
2000-12-31 1643
2001-03-31 2095
2001-06-30 1534
2001-09-30 2071
2001-12-31 944
2002-03-31 860
2002-06-30 1062
2002-09-30 1139
2002-12-31 861
2003-03-31 1679
2003-06-30 1399
2003-09-30 530
2003-12-31 820
2004-03-31 3390
2004-06-30 1887
2004-09-30 2512
2004-12-31 1887
2005-03-31 5637
2005-06-30 7742
2005-09-30 5991
2005-12-31 9404
2006-03-31 9384
2006-06-30 11801
2006-09-30 9854
2006-12-31 11503
2007-03-31 18220
2007-06-30 17505
2007-09-30 20773
2007-12-31 22194
2008-03-31 13922
2008-06-30 22912
2008-09-30 19519
2008-12-31 9028
2009-03-31 9248
2009-06-30 10607
2009-09-30 7373
2009-12-31 9076
2010-03-31 8219
2010-06-30 5019
2010-09-30 3563
2010-12-31 3809
2011-03-31 6586
2011-06-30 6014
2011-09-30 6383
2011-12-31 2362
2012-03-31 7286
2012-06-30 2408
2012-09-30 7083
2012-12-31 3089
2013-03-31 9351
2013-06-30 3866
2013-09-30 3443
2013-12-31 7486
2014-03-31 2231
2014-06-30 4318
2014-09-30 4916
2014-12-31 5212
2015-03-31 4875
2015-06-30 6674
2015-09-30 5810
2015-12-31 6714