Quarterly US dollars
1999-03-31 4125
1999-06-30 3534
1999-09-30 4352
1999-12-31 3928
2000-03-31 4282
2000-06-30 3884
2000-09-30 4059
2000-12-31 4009
2001-03-31 4912
2001-06-30 4617
2001-09-30 3840
2001-12-31 4849
2002-03-31 5008
2002-06-30 3783
2002-09-30 4089
2002-12-31 3865
2003-03-31 3654
2003-06-30 3208
2003-09-30 3174
2003-12-31 4225
2004-03-31 4736
2004-06-30 5231
2004-09-30 4444
2004-12-31 5610
2005-03-31 6292
2005-06-30 8349
2005-09-30 6688
2005-12-31 6381
2006-03-31 8408
2006-06-30 10666
2006-09-30 8919
2006-12-31 7443
2007-03-31 10462
2007-06-30 8731
2007-09-30 8449
2007-12-31 10561
2008-03-31 9434
2008-06-30 11371
2008-09-30 7819
2008-12-31 3505
2009-03-31 2093
2009-06-30 2296
2009-09-30 3809
2009-12-31 2763
2010-03-31 3624
2010-06-30 3008
2010-09-30 5430
2010-12-31 3853
2011-03-31 8818
2011-06-30 8649
2011-09-30 7050
2011-12-31 5153
2012-03-31 4818
2012-06-30 5147
2012-09-30 5607
2012-12-31 5251
2013-03-31 5964
2013-06-30 5277
2013-09-30 5700
2013-12-31 8062
2014-03-31 6258
2014-06-30 8127
2014-09-30 7784
2014-12-31 8536
2015-03-31 8950
2015-06-30 10118
2015-09-30 9275
2015-12-31 5863
2016-03-31 4479
2016-06-30 12434
2016-09-30 11795
2016-12-31 10067
2017-03-31 12017
2017-06-30 9938
2017-09-30 6945
2017-12-31 8004
2018-03-31 11898
2018-06-30 5347
2018-09-30 7262
2018-12-31 10045
2019-03-31 7069
2019-06-30 6461
2019-09-30 6668
2019-12-31 5458
2020-03-31 8658
2020-06-30 7344
2020-09-30 6751
2020-12-31 7792
2021-03-31 2102
2021-06-30 3833
2021-09-30 3813
2021-12-31 1916
2022-03-31 3905
2022-06-30 3911
2022-09-30 4807
2022-12-31 4992
2023-03-31 4514
2023-06-30 4304
2023-09-30 7500