Quarterly US dollars
1993-09-30 6
1993-12-31 12
1994-03-31 10
1994-06-30 10
1994-09-30 22
1994-12-31 21
1995-03-31 70
1995-06-30 105
1995-09-30 91
1995-12-31 236
1996-03-31 248
1996-06-30 345
1996-09-30 457
1996-12-31 594
1997-03-31 785
1997-06-30 810
1997-09-30 875
1997-12-31 1126
1998-03-31 1009
1998-06-30 1115
1998-09-30 1108
1998-12-31 1079
1999-03-31 1265
1999-06-30 1129
1999-09-30 1233
1999-12-31 1042
2000-03-31 1406
2000-06-30 1123
2000-09-30 1018
2000-12-31 620
2001-03-31 589
2001-06-30 573
2001-09-30 610
2001-12-31 502
2002-03-31 533
2002-06-30 508
2002-09-30 491
2002-12-31 472
2003-03-31 400
2003-06-30 513
2003-09-30 478
2003-12-31 639
2004-03-31 594
2004-06-30 452
2004-09-30 443
2004-12-31 256
2005-03-31 555
2005-06-30 791
2005-09-30 702
2005-12-31 688
2006-03-31 574
2006-06-30 567
2006-09-30 622
2006-12-31 670
2007-03-31 813
2007-06-30 598
2007-09-30 832
2007-12-31 1376
2008-03-31 1710
2008-06-30 1628
2008-09-30 1937
2008-12-31 1935
2009-03-31 674
2009-06-30 1155
2009-09-30 2164
2009-12-31 1029
2010-03-31 1091
2010-06-30 1164
2010-09-30 1204
2010-12-31 1206
2011-03-31 1262
2011-06-30 1327
2011-09-30 3418
2011-12-31 973
2012-03-31 1005
2012-06-30 948
2012-09-30 775
2012-12-31 703
2013-03-31 926
2013-06-30 1062
2013-09-30 1005
2013-12-31 782
2014-03-31 1100
2014-06-30 1127
2014-09-30 957
2014-12-31 715
2015-03-31 754
2015-06-30 759
2015-09-30 474
2015-12-31 550
2016-03-31 678
2016-06-30 669
2016-09-30 468
2016-12-31 467
2017-03-31 401
2017-06-30 421
2017-09-30 921
2017-12-31 1588
2018-03-31 2281
2018-06-30 2355
2018-09-30 1844
2018-12-31 1749
2019-03-31 1468
2019-06-30 1901
2019-09-30 1486
2019-12-31 781
2020-03-31 519
2020-06-30 852
2020-09-30 792
2020-12-31 295
2021-03-31 247
2021-06-30 193
2021-09-30 257
2021-12-31 293
2022-03-31 236
2022-06-30 203
2022-09-30 588
2022-12-31 506
2023-03-31 611
2023-06-30 582
2023-09-30 550