Quarter	US dollars
1999-03-31	917964
1999-06-30	882839
1999-09-30	935381
1999-12-31	910322
2000-03-31	1001164
2000-06-30	995287
2000-09-30	973369
2000-12-31	1083222
2001-03-31	1154017
2001-06-30	1076043
2001-09-30	1154966
2001-12-31	1110442
2002-03-31	1078212
2002-06-30	1140500
2002-09-30	1184804
2002-12-31	1282417
2003-03-31	1360975
2003-06-30	1472636
2003-09-30	1446336
2003-12-31	1617988
2004-03-31	1807885
2004-06-30	1792519
2004-09-30	1784824
2004-12-31	1868557
2005-03-31	2010539
2005-06-30	1994823
2005-09-30	2016117
2005-12-31	1996343
2006-03-31	2177693
2006-06-30	2335553
2006-09-30	2373598
2006-12-31	2495157
2007-03-31	2880188
2007-06-30	2997950
2007-09-30	3226671
2007-12-31	3411197
2008-03-31	3797111
2008-06-30	3547106
2008-09-30	3260491
2008-12-31	2945181
2009-03-31	2792317
2009-06-30	2969607
2009-09-30	2885928
2009-12-31	2749438
2010-03-31	2726477
2010-06-30	2628696
2010-09-30	2865398
2010-12-31	2621191
2011-03-31	2680777
2011-06-30	2705502
2011-09-30	2761896
2011-12-31	2592229
2012-03-31	2788228
2012-06-30	2700984
2012-09-30	2647280
2012-12-31	2553949
2013-03-31	2406345
2013-06-30	2303267
2013-09-30	2171939
2013-12-31	2109137
2014-03-31	2156907
2014-06-30	2102202
2014-09-30	1985353
2014-12-31	1918450
2015-03-31	1927711
2015-06-30	1904911
2015-09-30	1901333
2015-12-31	1817769
2016-03-31	1865462
2016-06-30	1912076
2016-09-30	1945354
2016-12-31	1820985
2017-03-31	1883695
2017-06-30	1967058
2017-09-30	2023970
2017-12-31	2066039
2018-03-31	2139122
2018-06-30	2085122
2018-09-30	2057258
2018-12-31	1988527
2019-03-31	1961387
2019-06-30	1981539
2019-09-30	1980881
2019-12-31	1866577
2020-03-31	1966985
2020-06-30	1946599
2020-09-30	2035069
2020-12-31	2094827
2021-03-31	2109050
2021-06-30	2092945
2021-09-30	1985301
2021-12-31	1996053
2022-03-31	2044838
2022-06-30	1977514
2022-09-30	1882255
2022-12-31	1910691
2023-03-31	1913083
2023-06-30	1884216
2023-09-30	1828756