Quarterly US dollars
1997-09-30 71210
1997-12-31 83271
1998-03-31 80840
1998-06-30 86219
1998-09-30 84283
1998-12-31 84969
1999-03-31 86183
1999-06-30 89032
1999-09-30 85826
1999-12-31 84035
2000-03-31 83701
2000-06-30 83681
2000-09-30 84300
2000-12-31 89975
2001-03-31 89290
2001-06-30 89874
2001-09-30 102319
2001-12-31 105722
2002-03-31 104560
2002-06-30 117395
2002-09-30 119712
2002-12-31 134578
2003-03-31 137854
2003-06-30 142794
2003-09-30 148377
2003-12-31 153909
2004-03-31 161244
2004-06-30 167635
2004-09-30 176975
2004-12-31 190678
2005-03-31 194108
2005-06-30 191171
2005-09-30 197441
2005-12-31 203120
2006-03-31 208496
2006-06-30 234384
2006-09-30 249407
2006-12-31 289218
2007-03-31 302685
2007-06-30 334806
2007-09-30 410204
2007-12-31 406008
2008-03-31 412374
2008-06-30 448274
2008-09-30 432070
2008-12-31 353754
2009-03-31 330584
2009-06-30 336042
2009-09-30 306652
2009-12-31 295989
2010-03-31 301780
2010-06-30 275924
2010-09-30 305080
2010-12-31 288084
2011-03-31 262607
2011-06-30 259677
2011-09-30 251287
2011-12-31 235013
2012-03-31 246963
2012-06-30 230857
2012-09-30 234943
2012-12-31 228171
2013-03-31 211450
2013-06-30 229164
2013-09-30 229275
2013-12-31 230184
2014-03-31 214080
2014-06-30 211583
2014-09-30 198384
2014-12-31 177704
2015-03-31 176749
2015-06-30 170139
2015-09-30 154190
2015-12-31 157084
2016-03-31 155715
2016-06-30 154661
2016-09-30 153964
2016-12-31 149363
2017-03-31 158002
2017-06-30 142693
2017-09-30 145963
2017-12-31 150205
2018-03-31 153867
2018-06-30 153815
2018-09-30 144626
2018-12-31 135052
2019-03-31 128031
2019-06-30 131366
2019-09-30 143800
2019-12-31 153403
2020-03-31 141404
2020-06-30 142556
2020-09-30 140429
2020-12-31 137060
2021-03-31 130440
2021-06-30 132319
2021-09-30 127696
2021-12-31 127630
2022-03-31 130126
2022-06-30 127210
2022-09-30 126493
2022-12-31 131938
2023-03-31 135286
2023-06-30 138906
2023-09-30 139013