Quarterly US dollars
1986-09-30 24393
1986-12-31 27023
1987-03-31 28158
1987-06-30 27760
1987-09-30 28422
1987-12-31 33943
1988-03-31 35623
1988-06-30 32078
1988-09-30 29626
1988-12-31 30972
1989-03-31 30418
1989-06-30 26668
1989-09-30 29300
1989-12-31 30811
1990-03-31 31531
1990-06-30 33923
1990-09-30 36891
1990-12-31 38246
1991-03-31 36393
1991-06-30 33705
1991-09-30 36672
1991-12-31 36308
1992-03-31 33917
1992-06-30 37817
1992-09-30 37511
1992-12-31 31448
1993-03-31 32045
1993-06-30 31798
1993-09-30 32169
1993-12-31 31619
1994-03-31 32662
1994-06-30 32419
1994-09-30 31706
1994-12-31 30704
1995-03-31 31050
1995-06-30 29408
1995-09-30 29390
1995-12-31 29611
1996-03-31 33588
1996-06-30 34452
1996-09-30 36254
1996-12-31 42686
1997-03-31 44235
1997-06-30 46938
1997-09-30 46519
1997-12-31 52298
1998-03-31 57564
1998-06-30 52532
1998-09-30 52217
1998-12-31 45975
1999-03-31 46721
1999-06-30 45308
1999-09-30 47716
1999-12-31 46802
2000-03-31 49943
2000-06-30 46596
2000-09-30 51955
2000-12-31 49470
2001-03-31 52476
2001-06-30 52303
2001-09-30 54115
2001-12-31 56463
2002-03-31 64486
2002-06-30 63291
2002-09-30 61585
2002-12-31 69462
2003-03-31 75012
2003-06-30 81857
2003-09-30 79781
2003-12-31 85029
2004-03-31 98779
2004-06-30 101089
2004-09-30 91911
2004-12-31 112813
2005-03-31 130021
2005-06-30 119784
2005-09-30 125365
2005-12-31 128962
2006-03-31 147852
2006-06-30 171439
2006-09-30 178132
2006-12-31 202739
2007-03-31 210174
2007-06-30 221120
2007-09-30 241072
2007-12-31 246822
2008-03-31 251158
2008-06-30 240232
2008-09-30 237222
2008-12-31 175847
2009-03-31 181646
2009-06-30 184992
2009-09-30 179397
2009-12-31 179188
2010-03-31 179191
2010-06-30 168262
2010-09-30 204513
2010-12-31 213357
2011-03-31 226163
2011-06-30 215281
2011-09-30 224851
2011-12-31 220213
2012-03-31 238435
2012-06-30 239073
2012-09-30 236112
2012-12-31 215999
2013-03-31 188884
2013-06-30 193722
2013-09-30 190949
2013-12-31 214264
2014-03-31 249607
2014-06-30 258145
2014-09-30 243853
2014-12-31 235858
2015-03-31 231171
2015-06-30 246915
2015-09-30 243456
2015-12-31 234859