Quarterly US dollars
1999-03-31 13986
1999-06-30 13715
1999-09-30 15793
1999-12-31 13772
2000-03-31 15788
2000-06-30 16843
2000-09-30 16706
2000-12-31 17305
2001-03-31 17701
2001-06-30 17894
2001-09-30 20191
2001-12-31 17084
2002-03-31 12220
2002-06-30 12172
2002-09-30 10736
2002-12-31 12036
2003-03-31 14329
2003-06-30 15307
2003-09-30 17146
2003-12-31 16966
2004-03-31 16364
2004-06-30 15955
2004-09-30 16180
2004-12-31 17027
2005-03-31 20321
2005-06-30 16110
2005-09-30 18198
2005-12-31 18188
2006-03-31 20682
2006-06-30 20036
2006-09-30 23587
2006-12-31 20510
2007-03-31 19403
2007-06-30 24324
2007-09-30 21643
2007-12-31 22072
2008-03-31 21313
2008-06-30 21725
2008-09-30 22973
2008-12-31 14527
2009-03-31 11313
2009-06-30 12617
2009-09-30 13881
2009-12-31 12461
2010-03-31 13714
2010-06-30 16777
2010-09-30 19112
2010-12-31 16264
2011-03-31 14794
2011-06-30 15327
2011-09-30 14191
2011-12-31 13286
2012-03-31 13009
2012-06-30 9381
2012-09-30 9696
2012-12-31 9493
2013-03-31 9341
2013-06-30 16144
2013-09-30 18430
2013-12-31 17748
2014-03-31 16766
2014-06-30 16914
2014-09-30 18520
2014-12-31 21205
2015-03-31 19562
2015-06-30 20566
2015-09-30 18153
2015-12-31 24314
2016-03-31 12678
2016-06-30 14337
2016-09-30 14035
2016-12-31 15038
2017-03-31 16133
2017-06-30 11674
2017-09-30 11745
2017-12-31 10389
2018-03-31 13440
2018-06-30 15238
2018-09-30 16742
2018-12-31 17649
2019-03-31 14624
2019-06-30 13457
2019-09-30 18304
2019-12-31 16243
2020-03-31 19654
2020-06-30 18319
2020-09-30 17183
2020-12-31 23710
2021-03-31 22962
2021-06-30 21246
2021-09-30 21412
2021-12-31 32600
2022-03-31 29642
2022-06-30 15010
2022-09-30 31773
2022-12-31 33196
2023-03-31 38372
2023-06-30 35285
2023-09-30 17848