Quarter	US dollars
1999-03-31	578
1999-06-30	616
1999-09-30	663
1999-12-31	688
2000-03-31	1458
2000-06-30	1309
2000-09-30	1993
2000-12-31	1927
2001-03-31	2178
2001-06-30	2613
2001-09-30	2621
2001-12-31	2190
2002-03-31	1767
2002-06-30	1634
2002-09-30	1706
2002-12-31	2025
2003-03-31	1516
2003-06-30	1216
2003-09-30	1331
2003-12-31	1861
2004-03-31	1335
2004-06-30	1240
2004-09-30	1388
2004-12-31	1638
2005-03-31	2192
2005-06-30	1988
2005-09-30	2542
2005-12-31	2462
2006-03-31	2952
2006-06-30	2902
2006-09-30	2795
2006-12-31	2761
2007-03-31	3213
2007-06-30	2812
2007-09-30	2995
2007-12-31	2796
2008-03-31	3432
2008-06-30	3123
2008-09-30	3721
2008-12-31	2297
2009-03-31	1063
2009-06-30	843
2009-09-30	590
2009-12-31	1129
2010-03-31	980
2010-06-30	1197
2010-09-30	1485
2010-12-31	1325
2011-03-31	1604
2011-06-30	1707
2011-09-30	1778
2011-12-31	1609
2012-03-31	2384
2012-06-30	2412
2012-09-30	2664
2012-12-31	2551
2013-03-31	2249
2013-06-30	2368
2013-09-30	2681
2013-12-31	2615
2014-03-31	2103
2014-06-30	2008
2014-09-30	1796
2014-12-31	2015
2015-03-31	1739
2015-06-30	1183
2015-09-30	1124
2015-12-31	1165
2016-03-31	1039
2016-06-30	1150
2016-09-30	1368
2016-12-31	1434
2017-03-31	1317
2017-06-30	1323
2017-09-30	1621
2017-12-31	1756
2018-03-31	1690
2018-06-30	1792
2018-09-30	2006
2018-12-31	1938
2019-03-31	1544
2019-06-30	1468
2019-09-30	1598
2019-12-31	1595
2020-03-31	1636
2020-06-30	2753
2020-09-30	2566
2020-12-31	3973
2021-03-31	4127
2021-06-30	2854
2021-09-30	3788
2021-12-31	2748
2022-03-31	2744
2022-06-30	2800
2022-09-30	3181
2022-12-31	3105
2023-03-31	3803
2023-06-30	3043
2023-09-30	3615