Quarterly US dollars
1999-03-31 67333
1999-06-30 60926
1999-09-30 58951
1999-12-31 62768
2000-03-31 64766
2000-06-30 67874
2000-09-30 73068
2000-12-31 79319
2001-03-31 89912
2001-06-30 98907
2001-09-30 105458
2001-12-31 104986
2002-03-31 129418
2002-06-30 142786
2002-09-30 149967
2002-12-31 129579
2003-03-31 133010
2003-06-30 145141
2003-09-30 163534
2003-12-31 173727
2004-03-31 179450
2004-06-30 197562
2004-09-30 219143
2004-12-31 244273
2005-03-31 269897
2005-06-30 291368
2005-09-30 308480
2005-12-31 300383
2006-03-31 315202
2006-06-30 341093
2006-09-30 341045
2006-12-31 373055
2007-03-31 381968
2007-06-30 408072
2007-09-30 445015
2007-12-31 504632
2008-03-31 492024
2008-06-30 463978
2008-09-30 442610
2008-12-31 360077
2009-03-31 346038
2009-06-30 337935
2009-09-30 333028
2009-12-31 361754
2010-03-31 349553
2010-06-30 307160
2010-09-30 318118
2010-12-31 321157
2011-03-31 325845
2011-06-30 315638
2011-09-30 307473
2011-12-31 293329
2012-03-31 295679
2012-06-30 285767
2012-09-30 290233
2012-12-31 283206
2013-03-31 288204
2013-06-30 262691
2013-09-30 262787
2013-12-31 274650
2014-03-31 297766
2014-06-30 319785
2014-09-30 309712
2014-12-31 310426
2015-03-31 314542
2015-06-30 316630
2015-09-30 329257
2015-12-31 299784
2016-03-31 301380
2016-06-30 298677
2016-09-30 282733
2016-12-31 288016
2017-03-31 281257
2017-06-30 280898
2017-09-30 295510
2017-12-31 316766
2018-03-31 317667
2018-06-30 303364
2018-09-30 294429
2018-12-31 327215
2019-03-31 319957
2019-06-30 319588
2019-09-30 302734
2019-12-31 315204
2020-03-31 320148
2020-06-30 312054
2020-09-30 315297
2020-12-31 334115
2021-03-31 332669
2021-06-30 342120
2021-09-30 341598
2021-12-31 345690
2022-03-31 333792
2022-06-30 327893
2022-09-30 297235
2022-12-31 304670
2023-03-31 314071
2023-06-30 313415
2023-09-30 297440