Quarterly US dollars
1999-03-31 81600
1999-06-30 88629
1999-09-30 80327
1999-12-31 74446
2000-03-31 81497
2000-06-30 76280
2000-09-30 82274
2000-12-31 78409
2001-03-31 86440
2001-06-30 88305
2001-09-30 90586
2001-12-31 91812
2002-03-31 98330
2002-06-30 101918
2002-09-30 109625
2002-12-31 117587
2003-03-31 111229
2003-06-30 129463
2003-09-30 156966
2003-12-31 169448
2004-03-31 159013
2004-06-30 175349
2004-09-30 183345
2004-12-31 213601
2005-03-31 232573
2005-06-30 247860
2005-09-30 241967
2005-12-31 258357
2006-03-31 267106
2006-06-30 308937
2006-09-30 283899
2006-12-31 306839
2007-03-31 328350
2007-06-30 349100
2007-09-30 389848
2007-12-31 410536
2008-03-31 435011
2008-06-30 420006
2008-09-30 439863
2008-12-31 346901
2009-03-31 319641
2009-06-30 318085
2009-09-30 297092
2009-12-31 330751
2010-03-31 322781
2010-06-30 290904
2010-09-30 320432
2010-12-31 325822
2011-03-31 326878
2011-06-30 333342
2011-09-30 287159
2011-12-31 267100
2012-03-31 280905
2012-06-30 264384
2012-09-30 262305
2012-12-31 251739
2013-03-31 267147
2013-06-30 268540
2013-09-30 265515
2013-12-31 260318
2014-03-31 245815
2014-06-30 260063
2014-09-30 274665
2014-12-31 271519
2015-03-31 267049
2015-06-30 262052
2015-09-30 268723
2015-12-31 248900
2016-03-31 257475
2016-06-30 270329
2016-09-30 257767
2016-12-31 270526
2017-03-31 260441
2017-06-30 250077
2017-09-30 270188
2017-12-31 299824
2018-03-31 292561
2018-06-30 286606
2018-09-30 272468
2018-12-31 294847
2019-03-31 267829
2019-06-30 269871
2019-09-30 250661
2019-12-31 269435
2020-03-31 278883
2020-06-30 257223
2020-09-30 247642
2020-12-31 260521
2021-03-31 275233
2021-06-30 303556
2021-09-30 309366
2021-12-31 338578
2022-03-31 337457
2022-06-30 339552
2022-09-30 304619
2022-12-31 294478
2023-03-31 301782
2023-06-30 295319
2023-09-30 289667