Quarterly US dollars
1997-09-30 222
1997-12-31 201
1998-03-31 199
1998-06-30 192
1998-09-30 193
1998-12-31 210
1999-03-31 188
1999-06-30 154
1999-09-30 164
1999-12-31 38
2000-03-31 147
2000-06-30 37
2000-09-30 10
2000-12-31 13
2001-03-31 74
2001-06-30 8
2001-09-30 14
2001-12-31 10
2002-03-31 65
2002-06-30 11
2002-09-30 1
2002-12-31 1
2003-03-31 1
2003-06-30 8
2003-09-30 3
2003-12-31 2
2004-03-31 2
2004-06-30 2
2004-09-30 3
2004-12-31 2
2005-03-31 8
2005-06-30 8
2005-09-30 2
2005-12-31 11
2006-03-31 8
2006-06-30 16
2006-09-30 12
2006-12-31 9
2007-03-31 8
2007-06-30 8
2007-09-30 8
2007-12-31 17
2008-03-31 9
2008-06-30 8
2008-09-30 9
2008-12-31 6
2009-03-31 4
2009-06-30 6
2009-09-30 4
2009-12-31 7
2010-03-31 9
2010-06-30 8
2010-09-30 10
2010-12-31 9
2011-03-31 9
2011-06-30 9
2011-09-30 8
2011-12-31 7
2012-03-31 9
2012-06-30 9
2012-09-30 10
2012-12-31 12
2013-03-31 8
2013-06-30 6
2013-09-30 7
2013-12-31 179
2014-03-31 525
2014-06-30 1247
2014-09-30 1707
2014-12-31 2146
2015-03-31 2251
2015-06-30 2135
2015-09-30 2151
2015-12-31 1822
2016-03-31 2094
2016-06-30 2663
2016-09-30 1883
2016-12-31 2494
2017-03-31 2291
2017-06-30 3348
2017-09-30 5002
2017-12-31 5692
2018-03-31 6419
2018-06-30 6485
2018-09-30 6340
2018-12-31 5503
2019-03-31 5682
2019-06-30 5308
2019-09-30 5185
2019-12-31 4968
2020-03-31 4488
2020-06-30 5866
2020-09-30 7903
2020-12-31 7574
2021-03-31 10395
2021-06-30 13638
2021-09-30 10559
2021-12-31 13210
2022-03-31 11553
2022-06-30 11027
2022-09-30 11302
2022-12-31 12516
2023-03-31 13597
2023-06-30 12837
2023-09-30 12273
2023-12-31 13960