Quarterly US dollars
1986-09-30 23000
1986-12-31 21000
1987-03-31 23000
1987-06-30 24000
1987-09-30 26000
1987-12-31 28000
1988-03-31 28000
1988-06-30 28000
1988-09-30 29000
1988-12-31 28000
1989-03-31 27000
1989-06-30 26000
1989-09-30 27000
1989-12-31 26000
1990-03-31 32000
1990-06-30 30000
1990-09-30 36000
1990-12-31 33000
1991-03-31 36000
1991-06-30 33000
1991-09-30 34000
1991-12-31 35000
1992-03-31 38000
1992-06-30 37000
1992-09-30 48000
1992-12-31 46000
1993-03-31 49000
1993-06-30 43000
1993-09-30 50000
1993-12-31 44000
1994-03-31 47000
1994-06-30 45000
1994-09-30 47000
1994-12-31 46000
1995-03-31 54000
1995-06-30 50000
1995-09-30 45000
1995-12-31 60000
1996-03-31 70000
1996-06-30 64000
1996-09-30 70000
1996-12-31 80000
1997-03-31 88000
1997-06-30 77000
1997-09-30 87000
1997-12-31 94000
1998-03-31 95000
1998-06-30 98000
1998-09-30 117000
1998-12-31 120000
1999-03-31 128084
1999-06-30 106489
1999-09-30 119403
1999-12-31 91874
2000-03-31 108896
2000-06-30 106077
2000-09-30 97245
2000-12-31 95499
2001-03-31 135926
2001-06-30 132004
2001-09-30 126419
2001-12-31 132839
2002-03-31 139751
2002-06-30 140424
2002-09-30 132079
2002-12-31 150286
2003-03-31 158371
2003-06-30 189748
2003-09-30 201951
2003-12-31 205126
2004-03-31 235694
2004-06-30 247720
2004-09-30 243650
2004-12-31 258137
2005-03-31 298687
2005-06-30 322428
2005-09-30 269046
2005-12-31 268275
2006-03-31 255917
2006-06-30 271916
2006-09-30 283706
2006-12-31 318370
2007-03-31 323861
2007-06-30 382365
2007-09-30 390829
2007-12-31 392356
2008-03-31 409594
2008-06-30 393434
2008-09-30 354356
2008-12-31 346494
2009-03-31 342193
2009-06-30 364454
2009-09-30 351142
2009-12-31 362169
2010-03-31 374061
2010-06-30 347455
2010-09-30 394716
2010-12-31 386411
2011-03-31 379959
2011-06-30 374658
2011-09-30 322694
2011-12-31 264610
2012-03-31 257387
2012-06-30 247880
2012-09-30 248664
2012-12-31 253485
2013-03-31 243738
2013-06-30 246476
2013-09-30 253697
2013-12-31 253973
2014-03-31 259389
2014-06-30 264286
2014-09-30 242750
2014-12-31 247676
2015-03-31 245821
2015-06-30 255734
2015-09-30 270922
2015-12-31 231886
2016-03-31 225558
2016-06-30 209008
2016-09-30 217001
2016-12-31 211492
2017-03-31 215411
2017-06-30 226207
2017-09-30 219509
2017-12-31 207672
2018-03-31 197952
2018-06-30 218381
2018-09-30 220828
2018-12-31 204776
2019-03-31 207912
2019-06-30 210929
2019-09-30 203314
2019-12-31 213958
2020-03-31 220237
2020-06-30 207570
2020-09-30 198861
2020-12-31 199106
2021-03-31 182988
2021-06-30 181795
2021-09-30 181174
2021-12-31 188085
2022-03-31 177297
2022-06-30 168563
2022-09-30 152790
2022-12-31 164623
2023-03-31 166054
2023-06-30 161290
2023-09-30 157225