Quarter	US dollars
1999-03-31	559
1999-06-30	515
1999-09-30	393
1999-12-31	572
2000-03-31	479
2000-06-30	374
2000-09-30	381
2000-12-31	426
2001-03-31	346
2001-06-30	268
2001-09-30	160
2001-12-31	295
2002-03-31	236
2002-06-30	161
2002-09-30	183
2002-12-31	355
2003-03-31	278
2003-06-30	222
2003-09-30	163
2003-12-31	428
2004-03-31	373
2004-06-30	232
2004-09-30	156
2004-12-31	496
2005-03-31	412
2005-06-30	281
2005-09-30	256
2005-12-31	506
2006-03-31	461
2006-06-30	361
2006-09-30	314
2006-12-31	537
2007-03-31	443
2007-06-30	622
2007-09-30	570
2007-12-31	809
2008-03-31	862
2008-06-30	585
2008-09-30	685
2008-12-31	579
2009-03-31	567
2009-06-30	479
2009-09-30	474
2009-12-31	923
2010-03-31	1233
2010-06-30	973
2010-09-30	1070
2010-12-31	1419
2011-03-31	1085
2011-06-30	855
2011-09-30	775
2011-12-31	1368
2012-03-31	1081
2012-06-30	1355
2012-09-30	1388
2012-12-31	2063
2013-03-31	2270
2013-06-30	1998
2013-09-30	1762
2013-12-31	2219
2014-03-31	2097
2014-06-30	1778
2014-09-30	1842
2014-12-31	1917
2015-03-31	1960
2015-06-30	1815
2015-09-30	1819
2015-12-31	2120
2016-03-31	2078
2016-06-30	2188
2016-09-30	2173
2016-12-31	2687
2017-03-31	2905
2017-06-30	2370
2017-09-30	2212
2017-12-31	2712
2018-03-31	2677
2018-06-30	2128
2018-09-30	1911
2018-12-31	2297
2019-03-31	2760
2019-06-30	2117
2019-09-30	1975
2019-12-31	2531
2020-03-31	2152
2020-06-30	2088
2020-09-30	2366
2020-12-31	2557
2021-03-31	2775
2021-06-30	2392
2021-09-30	2063
2021-12-31	2250
2022-03-31	2563
2022-06-30	1959
2022-09-30	1259
2022-12-31	1632
2023-03-31	1594
2023-06-30	1375
2023-09-30	1239