Quarterly US dollars
1999-03-31 3570
1999-06-30 3597
1999-09-30 3593
1999-12-31 3621
2000-03-31 2538
2000-06-30 2613
2000-09-30 2316
2000-12-31 2526
2001-03-31 2479
2001-06-30 2658
2001-09-30 2652
2001-12-31 2647
2002-03-31 2604
2002-06-30 2281
2002-09-30 2299
2002-12-31 2296
2003-03-31 2207
2003-06-30 2675
2003-09-30 2696
2003-12-31 2768
2004-03-31 2731
2004-06-30 2860
2004-09-30 3359
2004-12-31 4008
2005-03-31 3861
2005-06-30 4141
2005-09-30 3787
2005-12-31 3934
2006-03-31 4090
2006-06-30 4411
2006-09-30 4186
2006-12-31 4282
2007-03-31 3978
2007-06-30 4371
2007-09-30 4200
2007-12-31 4240
2008-03-31 4607
2008-06-30 3998
2008-09-30 4053
2008-12-31 3370
2009-03-31 3274
2009-06-30 3621
2009-09-30 2963
2009-12-31 2716
2010-03-31 2715
2010-06-30 2516
2010-09-30 3039
2010-12-31 3635
2011-03-31 3218
2011-06-30 2837
2011-09-30 2555
2011-12-31 3299
2012-03-31 2209
2012-06-30 2335
2012-09-30 2117
2012-12-31 2148
2013-03-31 2203
2013-06-30 2110
2013-09-30 2080
2013-12-31 1567
2014-03-31 1928
2014-06-30 1327
2014-09-30 1325
2014-12-31 1113
2015-03-31 708
2015-06-30 1190
2015-09-30 1066
2015-12-31 1109
2016-03-31 948
2016-06-30 1424
2016-09-30 1464
2016-12-31 1552
2017-03-31 1681
2017-06-30 1153
2017-09-30 761
2017-12-31 1714
2018-03-31 693
2018-06-30 570
2018-09-30 1250
2018-12-31 1059
2019-03-31 526
2019-06-30 627
2019-09-30 1099
2019-12-31 444
2020-03-31 3950
2020-06-30 3817
2020-09-30 683
2020-12-31 399
2021-03-31 1499
2021-06-30 2131
2021-09-30 2466
2021-12-31 2268
2022-03-31 1816
2022-06-30 599
2022-09-30 1211
2022-12-31 1305
2023-03-31 1426
2023-06-30 594
2023-09-30 533