Quarterly US dollars
1999-03-31 2291
1999-06-30 2419
1999-09-30 1619
1999-12-31 1470
2000-03-31 1310
2000-06-30 1818
2000-09-30 1635
2000-12-31 2502
2001-03-31 2270
2001-06-30 2195
2001-09-30 2022
2001-12-31 2078
2002-03-31 2334
2002-06-30 2948
2002-09-30 2625
2002-12-31 2908
2003-03-31 2827
2003-06-30 2885
2003-09-30 3306
2003-12-31 3337
2004-03-31 3723
2004-06-30 4075
2004-09-30 4482
2004-12-31 4309
2005-03-31 4020
2005-06-30 3934
2005-09-30 3407
2005-12-31 3875
2006-03-31 4898
2006-06-30 5406
2006-09-30 5529
2006-12-31 5281
2007-03-31 5812
2007-06-30 6875
2007-09-30 9985
2007-12-31 15913
2008-03-31 19410
2008-06-30 17701
2008-09-30 18452
2008-12-31 14476
2009-03-31 12079
2009-06-30 13899
2009-09-30 13341
2009-12-31 12471
2010-03-31 11482
2010-06-30 12133
2010-09-30 12448
2010-12-31 12539
2011-03-31 11782
2011-06-30 11854
2011-09-30 14748
2011-12-31 17752
2012-03-31 15417
2012-06-30 15117
2012-09-30 13839
2012-12-31 24256
2013-03-31 24236
2013-06-30 23598
2013-09-30 28723
2013-12-31 23132
2014-03-31 30418
2014-06-30 27297
2014-09-30 31966
2014-12-31 33797
2015-03-31 34019
2015-06-30 38742
2015-09-30 39015
2015-12-31 47747
2016-03-31 39764
2016-06-30 40727
2016-09-30 39207
2016-12-31 36395
2017-03-31 35538
2017-06-30 35840
2017-09-30 38070
2017-12-31 39538
2018-03-31 39967
2018-06-30 38339
2018-09-30 38978
2018-12-31 36831
2019-03-31 38195
2019-06-30 41545
2019-09-30 39472
2019-12-31 38264
2020-03-31 35505
2020-06-30 35332
2020-09-30 35036
2020-12-31 33230
2021-03-31 35644
2021-06-30 37035
2021-09-30 36841
2021-12-31 37522
2022-03-31 38046
2022-06-30 40513
2022-09-30 38817
2022-12-31 38230
2023-03-31 37713
2023-06-30 39716
2023-09-30 37960