Quarter	US dollars
1999-03-31	166409
1999-06-30	174729
1999-09-30	168987
1999-12-31	171495
2000-03-31	204414
2000-06-30	220246
2000-09-30	218283
2000-12-31	232666
2001-03-31	293359
2001-06-30	271182
2001-09-30	272055
2001-12-31	255895
2002-03-31	269567
2002-06-30	283759
2002-09-30	284928
2002-12-31	296497
2003-03-31	346213
2003-06-30	358594
2003-09-30	400994
2003-12-31	393377
2004-03-31	447280
2004-06-30	418896
2004-09-30	465766
2004-12-31	514344
2005-03-31	599120
2005-06-30	607314
2005-09-30	668993
2005-12-31	656886
2006-03-31	763197
2006-06-30	790149
2006-09-30	869194
2006-12-31	882115
2007-03-31	1022803
2007-06-30	1112252
2007-09-30	1116937
2007-12-31	1050896
2008-03-31	1024917
2008-06-30	941340
2008-09-30	999437
2008-12-31	707693
2009-03-31	693747
2009-06-30	654120
2009-09-30	689881
2009-12-31	642588
2010-03-31	695356
2010-06-30	679595
2010-09-30	755931
2010-12-31	763733
2011-03-31	816107
2011-06-30	827722
2011-09-30	767228
2011-12-31	730994
2012-03-31	757600
2012-06-30	750245
2012-09-30	766072
2012-12-31	752652
2013-03-31	716321
2013-06-30	742061
2013-09-30	676500
2013-12-31	682164
2014-03-31	675085
2014-06-30	672000
2014-09-30	676180
2014-12-31	659816
2015-03-31	637806
2015-06-30	601480
2015-09-30	626433
2015-12-31	588484
2016-03-31	597705
2016-06-30	625473
2016-09-30	585432
2016-12-31	533874
2017-03-31	566822
2017-06-30	572633
2017-09-30	625422
2017-12-31	685754
2018-03-31	733854
2018-06-30	677772
2018-09-30	654920
2018-12-31	759777
2019-03-31	749255
2019-06-30	734285
2019-09-30	740828
2019-12-31	769881
2020-03-31	912927
2020-06-30	805457
2020-09-30	830281
2020-12-31	884852
2021-03-31	879551
2021-06-30	883777
2021-09-30	872451
2021-12-31	922828
2022-03-31	923118
2022-06-30	892266
2022-09-30	900826
2022-12-31	880896
2023-03-31	886451
2023-06-30	878309
2023-09-30	905407