Quarterly US dollars
1986-09-30 56914
1986-12-31 59314
1987-03-31 66890
1987-06-30 63336
1987-09-30 61315
1987-12-31 72887
1988-03-31 70969
1988-06-30 64646
1988-09-30 64990
1988-12-31 64844
1989-03-31 66425
1989-06-30 67864
1989-09-30 70678
1989-12-31 77441
1990-03-31 90447
1990-06-30 93546
1990-09-30 105525
1990-12-31 106128
1991-03-31 101036
1991-06-30 97998
1991-09-30 102299
1991-12-31 107573
1992-03-31 102691
1992-06-30 112663
1992-09-30 123511
1992-12-31 112326
1993-03-31 114946
1993-06-30 112140
1993-09-30 117702
1993-12-31 115208
1994-03-31 120445
1994-06-30 130076
1994-09-30 138259
1994-12-31 135042
1995-03-31 154674
1995-06-30 155808
1995-09-30 150086
1995-12-31 155775
1996-03-31 171608
1996-06-30 174977
1996-09-30 196522
1996-12-31 202050
1997-03-31 210821
1997-06-30 203109
1997-09-30 228388
1997-12-31 232696
1998-03-31 249478
1998-06-30 260332
1998-09-30 310889
1998-12-31 282985
1999-03-31 56070
1999-06-30 59246
1999-09-30 67635
1999-12-31 74339
2000-03-31 65403
2000-06-30 67583
2000-09-30 57874
2000-12-31 66889
2001-03-31 58587
2001-06-30 57761
2001-09-30 65119
2001-12-31 66421
2002-03-31 74316
2002-06-30 84349
2002-09-30 84020
2002-12-31 92476
2003-03-31 93611
2003-06-30 109394
2003-09-30 103623
2003-12-31 116510
2004-03-31 134725
2004-06-30 119456
2004-09-30 132665
2004-12-31 131511
2005-03-31 136985
2005-06-30 139095
2005-09-30 146587
2005-12-31 148621
2006-03-31 172028
2006-06-30 183479
2006-09-30 196945
2006-12-31 195871
2007-03-31 211464
2007-06-30 216566
2007-09-30 232427
2007-12-31 223888
2008-03-31 251055
2008-06-30 234317
2008-09-30 218157
2008-12-31 179444
2009-03-31 175823
2009-06-30 185861
2009-09-30 201896
2009-12-31 207500
2010-03-31 207579
2010-06-30 210645
2010-09-30 212183
2010-12-31 228466
2011-03-31 243168
2011-06-30 257254
2011-09-30 241593
2011-12-31 233405
2012-03-31 219230
2012-06-30 209900
2012-09-30 213952
2012-12-31 228992
2013-03-31 230888
2013-06-30 207632
2013-09-30 217034
2013-12-31 225646
2014-03-31 234678
2014-06-30 241758
2014-09-30 220715
2014-12-31 205055
2015-03-31 204314
2015-06-30 200841
2015-09-30 188368
2015-12-31 177223