Quarterly US dollars
1986-09-30 95
1986-12-31 78
1987-03-31 60
1987-06-30 55
1987-09-30 62
1987-12-31 69
1988-03-31 55
1988-06-30 60
1988-09-30 55
1988-12-31 53
1989-03-31 62
1989-06-30 74
1989-09-30 68
1989-12-31 74
1990-03-31 75
1990-06-30 80
1990-09-30 94
1990-12-31 96
1991-03-31 85
1991-06-30 166
1991-09-30 358
1991-12-31 422
1992-03-31 382
1992-06-30 618
1992-09-30 831
1992-12-31 915
1993-03-31 1024
1993-06-30 54
1993-09-30 59
1993-12-31 52
1994-03-31 103
1994-06-30 98
1994-09-30 104
1994-12-31 78
1995-03-31 67
1995-06-30 89
1995-09-30 63
1995-12-31 69
1996-03-31 53
1996-06-30 62
1996-09-30 103
1996-12-31 69
1997-03-31 51
1997-06-30 57
1997-09-30 100
1997-12-31 91
1998-03-31 1277
1998-06-30 1283
1998-09-30 1512
1998-12-31 2050
1999-03-31 2925
1999-06-30 2497
1999-09-30 2647
1999-12-31 2543
2000-03-31 3013
2000-06-30 4002
2000-09-30 2810
2000-12-31 2705
2001-03-31 2915
2001-06-30 2736
2001-09-30 3130
2001-12-31 4159
2002-03-31 2809
2002-06-30 4012
2002-09-30 2860
2002-12-31 2829
2003-03-31 3631
2003-06-30 2756
2003-09-30 2889
2003-12-31 3244
2004-03-31 2855
2004-06-30 2402
2004-09-30 2763
2004-12-31 2713
2005-03-31 3537
2005-06-30 2126
2005-09-30 2330
2005-12-31 3012
2006-03-31 3452
2006-06-30 3853
2006-09-30 3411
2006-12-31 3506
2007-03-31 3481
2007-06-30 3506
2007-09-30 3021
2007-12-31 3949
2008-03-31 5530
2008-06-30 5704
2008-09-30 3966
2008-12-31 936
2009-03-31 1266
2009-06-30 1741
2009-09-30 1751
2009-12-31 489
2010-03-31 1815
2010-06-30 2611
2010-09-30 1934
2010-12-31 1402
2011-03-31 1414
2011-06-30 1227
2011-09-30 1509
2011-12-31 2396
2012-03-31 2159
2012-06-30 1371
2012-09-30 1693
2012-12-31 2144
2013-03-31 3054
2013-06-30 2926
2013-09-30 1930
2013-12-31 1232
2014-03-31 2012
2014-06-30 1153
2014-09-30 1285
2014-12-31 2488
2015-03-31 1526
2015-06-30 1509
2015-09-30 2837
2015-12-31 2172
2016-03-31 3515
2016-06-30 3418
2016-09-30 3496
2016-12-31 4888
2017-03-31 6063
2017-06-30 2972
2017-09-30 3003
2017-12-31 2378
2018-03-31 3262
2018-06-30 3083
2018-09-30 3606
2018-12-31 4081
2019-03-31 3764
2019-06-30 2664
2019-09-30 3945
2019-12-31 4315
2020-03-31 4324
2020-06-30 4955
2020-09-30 4292
2020-12-31 6646
2021-03-31 6588
2021-06-30 4315
2021-09-30 5070
2021-12-31 4533
2022-03-31 5679
2022-06-30 4005
2022-09-30 3643
2022-12-31 5141
2023-03-31 3961
2023-06-30 3911
2023-09-30 3797