Quarterly US dollars
1986-09-30 60817
1986-12-31 59332
1987-03-31 65285
1987-06-30 72039
1987-09-30 76630
1987-12-31 88600
1988-03-31 83763
1988-06-30 85000
1988-09-30 85531
1988-12-31 91244
1989-03-31 94632
1989-06-30 95217
1989-09-30 99867
1989-12-31 95901
1990-03-31 95951
1990-06-30 101673
1990-09-30 105872
1990-12-31 105248
1991-03-31 91142
1991-06-30 91425
1991-09-30 94200
1991-12-31 94822
1992-03-31 87685
1992-06-30 93894
1992-09-30 90879
1992-12-31 86990
1993-03-31 83175
1993-06-30 85111
1993-09-30 86652
1993-12-31 94870
1994-03-31 99064
1994-06-30 106154
1994-09-30 116079
1994-12-31 117840
1995-03-31 121796
1995-06-30 124887
1995-09-30 120681
1995-12-31 121578
1996-03-31 125148
1996-06-30 126293
1996-09-30 131478
1996-12-31 130255
1997-03-31 139944
1997-06-30 130021
1997-09-30 124813
1997-12-31 122325
1998-03-31 135144
1998-06-30 130693
1998-09-30 124531
1998-12-31 111810
1999-03-31 157330
1999-06-30 221095
1999-09-30 153921
1999-12-31 125362
2000-03-31 141611
2000-06-30 150013
2000-09-30 146501
2000-12-31 132015
2001-03-31 142501
2001-06-30 135873
2001-09-30 139097
2001-12-31 129372
2002-03-31 122465
2002-06-30 128727
2002-09-30 137293
2002-12-31 154576
2003-03-31 169193
2003-06-30 174658
2003-09-30 195518
2003-12-31 211808
2004-03-31 238096
2004-06-30 249203
2004-09-30 266076
2004-12-31 270756
2005-03-31 313919
2005-06-30 303633
2005-09-30 337411
2005-12-31 374202
2006-03-31 402009
2006-06-30 420818
2006-09-30 427653
2006-12-31 435972
2007-03-31 495618
2007-06-30 471713
2007-09-30 544640
2007-12-31 591710
2008-03-31 584133
2008-06-30 480938
2008-09-30 525685
2008-12-31 324235
2009-03-31 263969
2009-06-30 244875
2009-09-30 257016
2009-12-31 261836
2010-03-31 269543
2010-06-30 272711
2010-09-30 255814
2010-12-31 284374
2011-03-31 299610
2011-06-30 283996
2011-09-30 296099
2011-12-31 283215
2012-03-31 316584
2012-06-30 297156
2012-09-30 283858
2012-12-31 282560
2013-03-31 297703
2013-06-30 279347
2013-09-30 317012
2013-12-31 357348
2014-03-31 362074
2014-06-30 361413
2014-09-30 337559
2014-12-31 329706
2015-03-31 296629
2015-06-30 317323
2015-09-30 334164
2015-12-31 316810