Quarterly US dollars
1999-03-31 30577
1999-06-30 37130
1999-09-30 31594
1999-12-31 26182
2000-03-31 29422
2000-06-30 27009
2000-09-30 25121
2000-12-31 26010
2001-03-31 26557
2001-06-30 26299
2001-09-30 29791
2001-12-31 25724
2002-03-31 26852
2002-06-30 23293
2002-09-30 30889
2002-12-31 24966
2003-03-31 33808
2003-06-30 32846
2003-09-30 36126
2003-12-31 37999
2004-03-31 50631
2004-06-30 41324
2004-09-30 41609
2004-12-31 44024
2005-03-31 39130
2005-06-30 39700
2005-09-30 45037
2005-12-31 47738
2006-03-31 45034
2006-06-30 51785
2006-09-30 35854
2006-12-31 27351
2007-03-31 31943
2007-06-30 32158
2007-09-30 31096
2007-12-31 32154
2008-03-31 52530
2008-06-30 56033
2008-09-30 53355
2008-12-31 84786
2009-03-31 20781
2009-06-30 19241
2009-09-30 29585
2009-12-31 26639
2010-03-31 30618
2010-06-30 44246
2010-09-30 25511
2010-12-31 20939
2011-03-31 23227
2011-06-30 24244
2011-09-30 28210
2011-12-31 42230
2012-03-31 56441
2012-06-30 47133
2012-09-30 34624
2012-12-31 26222
2013-03-31 19526
2013-06-30 20827
2013-09-30 19383
2013-12-31 21636
2014-03-31 18765
2014-06-30 18676
2014-09-30 16344
2014-12-31 13182
2015-03-31 17722
2015-06-30 15152
2015-09-30 15938
2015-12-31 10359
2016-03-31 9518
2016-06-30 12300
2016-09-30 19905
2016-12-31 20835
2017-03-31 13029
2017-06-30 22086
2017-09-30 16818
2017-12-31 24269
2018-03-31 18602
2018-06-30 24763
2018-09-30 20461
2018-12-31 18029
2019-03-31 20132
2019-06-30 15717
2019-09-30 19497
2019-12-31 13159
2020-03-31 16210
2020-06-30 18505
2020-09-30 16554
2020-12-31 35712
2021-03-31 29712
2021-06-30 42493
2021-09-30 29200
2021-12-31 42548
2022-03-31 31631
2022-06-30 35037
2022-09-30 18629
2022-12-31 8568
2023-03-31 17026
2023-06-30 10673
2023-09-30 11983