Quarterly US dollars
1999-03-31 1846
1999-06-30 2181
1999-09-30 2509
1999-12-31 2700
2000-03-31 2668
2000-06-30 2421
2000-09-30 2387
2000-12-31 2399
2001-03-31 2544
2001-06-30 2572
2001-09-30 2553
2001-12-31 2504
2002-03-31 2407
2002-06-30 2702
2002-09-30 2655
2002-12-31 2993
2003-03-31 2890
2003-06-30 3157
2003-09-30 3061
2003-12-31 3533
2004-03-31 3527
2004-06-30 3794
2004-09-30 4116
2004-12-31 5723
2005-03-31 6942
2005-06-30 6557
2005-09-30 6167
2005-12-31 5252
2006-03-31 5867
2006-06-30 7013
2006-09-30 7013
2006-12-31 8237
2007-03-31 8475
2007-06-30 10534
2007-09-30 13363
2007-12-31 13294
2008-03-31 14577
2008-06-30 14131
2008-09-30 13239
2008-12-31 11161
2009-03-31 11205
2009-06-30 13142
2009-09-30 13656
2009-12-31 11855
2010-03-31 11228
2010-06-30 10192
2010-09-30 10761
2010-12-31 9892
2011-03-31 10085
2011-06-30 9690
2011-09-30 8867
2011-12-31 8355
2012-03-31 8280
2012-06-30 8174
2012-09-30 8216
2012-12-31 7636
2013-03-31 7158
2013-06-30 6528
2013-09-30 6946
2013-12-31 7167
2014-03-31 7264
2014-06-30 8042
2014-09-30 6707
2014-12-31 6710
2015-03-31 6602
2015-06-30 6858
2015-09-30 7322
2015-12-31 7447
2016-03-31 7507
2016-06-30 7412
2016-09-30 7227
2016-12-31 7357
2017-03-31 7431
2017-06-30 8000
2017-09-30 8047
2017-12-31 7799
2018-03-31 9230
2018-06-30 7202
2018-09-30 6461
2018-12-31 5657
2019-03-31 5920
2019-06-30 5856
2019-09-30 5652
2019-12-31 5736
2020-03-31 6375
2020-06-30 6182
2020-09-30 5965
2020-12-31 5553
2021-03-31 6186
2021-06-30 6221
2021-09-30 6099
2021-12-31 5587
2022-03-31 4780
2022-06-30 4425
2022-09-30 4052
2022-12-31 4023
2023-03-31 4182
2023-06-30 4405
2023-09-30 4188