Quarterly US dollars
1986-09-30 20249
1986-12-31 21512
1987-03-31 23763
1987-06-30 23357
1987-09-30 22767
1987-12-31 26304
1988-03-31 25867
1988-06-30 26019
1988-09-30 25165
1988-12-31 28092
1989-03-31 25637
1989-06-30 27598
1989-09-30 30968
1989-12-31 34194
1990-03-31 36726
1990-06-30 41240
1990-09-30 51346
1990-12-31 54624
1991-03-31 55111
1991-06-30 55122
1991-09-30 64138
1991-12-31 62464
1992-03-31 60919
1992-06-30 68363
1992-09-30 68785
1992-12-31 71578
1993-03-31 80828
1993-06-30 76924
1993-09-30 82112
1993-12-31 85081
1994-03-31 82623
1994-06-30 79776
1994-09-30 77671
1994-12-31 83727
1995-03-31 88331
1995-06-30 97383
1995-09-30 98722
1995-12-31 109863
1996-03-31 116990
1996-06-30 121036
1996-09-30 123563
1996-12-31 121909
1997-03-31 122396
1997-06-30 121253
1997-09-30 125949
1997-12-31 134942
1998-03-31 155507
1998-06-30 185390
1998-09-30 194263
1998-12-31 167511
1999-03-31 38941
1999-06-30 34376
1999-09-30 37459
1999-12-31 35991
2000-03-31 37289
2000-06-30 37721
2000-09-30 42843
2000-12-31 39902
2001-03-31 37853
2001-06-30 37899
2001-09-30 37341
2001-12-31 36014
2002-03-31 39150
2002-06-30 38823
2002-09-30 40319
2002-12-31 39062
2003-03-31 37818
2003-06-30 39253
2003-09-30 42045
2003-12-31 46070
2004-03-31 59905
2004-06-30 53554
2004-09-30 55368
2004-12-31 61802
2005-03-31 64097
2005-06-30 69837
2005-09-30 69913
2005-12-31 73312
2006-03-31 81945
2006-06-30 85190
2006-09-30 93308
2006-12-31 100707
2007-03-31 119131
2007-06-30 135888
2007-09-30 134206
2007-12-31 142714
2008-03-31 137935
2008-06-30 135503
2008-09-30 114686
2008-12-31 90046
2009-03-31 80709
2009-06-30 90946
2009-09-30 97860
2009-12-31 101711
2010-03-31 113828
2010-06-30 98890
2010-09-30 115660
2010-12-31 124217
2011-03-31 128054
2011-06-30 132071
2011-09-30 131177
2011-12-31 110966
2012-03-31 125053
2012-06-30 119923
2012-09-30 134881
2012-12-31 135754
2013-03-31 134166
2013-06-30 117995
2013-09-30 121110
2013-12-31 113270
2014-03-31 110199
2014-06-30 113719
2014-09-30 106669
2014-12-31 97173
2015-03-31 94560
2015-06-30 97001
2015-09-30 92645
2015-12-31 99240