Quarterly US dollars
1986-09-30 3490
1986-12-31 3125
1987-03-31 3902
1987-06-30 4957
1987-09-30 6101
1987-12-31 8082
1988-03-31 6944
1988-06-30 7653
1988-09-30 7231
1988-12-31 6855
1989-03-31 6710
1989-06-30 6623
1989-09-30 7174
1989-12-31 6670
1990-03-31 7603
1990-06-30 8807
1990-09-30 11275
1990-12-31 11695
1991-03-31 9570
1991-06-30 9907
1991-09-30 9503
1991-12-31 9239
1992-03-31 7257
1992-06-30 7416
1992-09-30 7554
1992-12-31 7435
1993-03-31 7551
1993-06-30 7837
1993-09-30 7143
1993-12-31 5378
1994-03-31 7083
1994-06-30 8458
1994-09-30 7422
1994-12-31 7789
1995-03-31 11513
1995-06-30 11792
1995-09-30 11936
1995-12-31 16310
1996-03-31 21531
1996-06-30 22371
1996-09-30 24758
1996-12-31 22829
1997-03-31 26912
1997-06-30 30694
1997-09-30 28952
1997-12-31 32024
1998-03-31 32707
1998-06-30 33572
1998-09-30 40352
1998-12-31 40378
1999-03-31 48760
1999-06-30 45245
1999-09-30 52185
1999-12-31 59226
2000-03-31 62606
2000-06-30 55304
2000-09-30 52388
2000-12-31 50984
2001-03-31 48137
2001-06-30 51706
2001-09-30 48218
2001-12-31 49359
2002-03-31 54384
2002-06-30 52904
2002-09-30 58920
2002-12-31 54847
2003-03-31 49125
2003-06-30 44886
2003-09-30 50444
2003-12-31 48265
2004-03-31 51174
2004-06-30 59872
2004-09-30 70187
2004-12-31 85895
2005-03-31 86198
2005-06-30 95666
2005-09-30 78326
2005-12-31 76490
2006-03-31 87442
2006-06-30 70847
2006-09-30 67343
2006-12-31 100194
2007-03-31 111454
2007-06-30 89850
2007-09-30 105588
2007-12-31 104533
2008-03-31 171907
2008-06-30 99894
2008-09-30 118205
2008-12-31 79322
2009-03-31 64783
2009-06-30 75831
2009-09-30 77849
2009-12-31 77186
2010-03-31 65556
2010-06-30 77388
2010-09-30 81670
2010-12-31 72763
2011-03-31 78845
2011-06-30 81370
2011-09-30 88994
2011-12-31 105248
2012-03-31 98015
2012-06-30 95148
2012-09-30 93539
2012-12-31 76379
2013-03-31 83168
2013-06-30 90509
2013-09-30 90383
2013-12-31 79115
2014-03-31 79500
2014-06-30 84150
2014-09-30 79925
2014-12-31 79529
2015-03-31 72775
2015-06-30 64192
2015-09-30 62212
2015-12-31 65375