Quarterly US dollars
1997-09-30 0
1997-12-31 0
1998-03-31 0
1998-06-30 0
1998-09-30 116
1998-12-31 0
1999-03-31 0
1999-06-30 0
1999-09-30 30
1999-12-31 34
2000-03-31 0
2000-06-30 0
2000-09-30 0
2000-12-31 90
2001-03-31 435
2001-06-30 785
2001-09-30 859
2001-12-31 1379
2002-03-31 1612
2002-06-30 1703
2002-09-30 1656
2002-12-31 1709
2003-03-31 2046
2003-06-30 2015
2003-09-30 2145
2003-12-31 2242
2004-03-31 2298
2004-06-30 2190
2004-09-30 2156
2004-12-31 2220
2005-03-31 2498
2005-06-30 2405
2005-09-30 2346
2005-12-31 1329
2006-03-31 1494
2006-06-30 1106
2006-09-30 1059
2006-12-31 1048
2007-03-31 1059
2007-06-30 1012
2007-09-30 1189
2007-12-31 2390
2008-03-31 2951
2008-06-30 1144
2008-09-30 793
2008-12-31 288
2009-03-31 264
2009-06-30 926
2009-09-30 2000
2009-12-31 1826
2010-03-31 1121
2010-06-30 1258
2010-09-30 1752
2010-12-31 3545
2011-03-31 3518
2011-06-30 3768
2011-09-30 5090
2011-12-31 3813
2012-03-31 2944
2012-06-30 1343
2012-09-30 1251
2012-12-31 1020
2013-03-31 1356
2013-06-30 1045
2013-09-30 1055
2013-12-31 1474
2014-03-31 1190
2014-06-30 1416
2014-09-30 1384
2014-12-31 1212
2015-03-31 1101
2015-06-30 998
2015-09-30 1019
2015-12-31 1182
2016-03-31 1265
2016-06-30 1849
2016-09-30 1640
2016-12-31 1391
2017-03-31 1507
2017-06-30 1439
2017-09-30 1287
2017-12-31 1284
2018-03-31 1561
2018-06-30 1500
2018-09-30 2175
2018-12-31 2425
2019-03-31 2761
2019-06-30 2693
2019-09-30 3139
2019-12-31 4086
2020-03-31 2737
2020-06-30 3435
2020-09-30 2964
2020-12-31 3226
2021-03-31 2943
2021-06-30 3940
2021-09-30 4404
2021-12-31 5386
2022-03-31 7091
2022-06-30 6981
2022-09-30 4719
2022-12-31 4420
2023-03-31 4838
2023-06-30 5372
2023-09-30 7247
2023-12-31 6665