Quarterly US dollars
1986-09-30 1262
1986-12-31 1296
1987-03-31 1573
1987-06-30 1606
1987-09-30 1599
1987-12-31 1835
1988-03-31 1826
1988-06-30 2309
1988-09-30 2317
1988-12-31 2261
1989-03-31 2270
1989-06-30 2223
1989-09-30 2295
1989-12-31 2411
1990-03-31 2294
1990-06-30 2570
1990-09-30 2686
1990-12-31 2369
1991-03-31 2287
1991-06-30 2054
1991-09-30 1900
1991-12-31 2231
1992-03-31 2300
1992-06-30 2155
1992-09-30 2216
1992-12-31 2036
1993-03-31 1780
1993-06-30 1840
1993-09-30 1793
1993-12-31 1846
1994-03-31 1990
1994-06-30 2059
1994-09-30 1938
1994-12-31 1889
1995-03-31 2169
1995-06-30 2407
1995-09-30 2373
1995-12-31 2292
1996-03-31 2312
1996-06-30 2407
1996-09-30 2470
1996-12-31 2763
1997-03-31 3205
1997-06-30 4020
1997-09-30 3909
1997-12-31 4343
1998-03-31 4399
1998-06-30 5854
1998-09-30 4229
1998-12-31 3947
1999-03-31 4767
1999-06-30 4609
1999-09-30 5457
1999-12-31 4817
2000-03-31 5104
2000-06-30 4433
2000-09-30 5569
2000-12-31 4703
2001-03-31 5503
2001-06-30 6011
2001-09-30 6992
2001-12-31 6037
2002-03-31 5788
2002-06-30 7989
2002-09-30 6997
2002-12-31 8265
2003-03-31 8683
2003-06-30 12378
2003-09-30 13965
2003-12-31 14079
2004-03-31 16859
2004-06-30 16465
2004-09-30 17042
2004-12-31 17988
2005-03-31 17934
2005-06-30 18865
2005-09-30 21370
2005-12-31 16901
2006-03-31 23693
2006-06-30 28511
2006-09-30 25558
2006-12-31 23993
2007-03-31 24684
2007-06-30 24837
2007-09-30 30188
2007-12-31 27340
2008-03-31 22708
2008-06-30 21584
2008-09-30 21323
2008-12-31 21072
2009-03-31 16875
2009-06-30 17730
2009-09-30 18655
2009-12-31 17429
2010-03-31 17627
2010-06-30 17522
2010-09-30 20331
2010-12-31 22590
2011-03-31 20208
2011-06-30 19118
2011-09-30 17866
2011-12-31 16955
2012-03-31 16381
2012-06-30 22750
2012-09-30 19821
2012-12-31 16657
2013-03-31 17313
2013-06-30 17951
2013-09-30 21365
2013-12-31 20900
2014-03-31 20591
2014-06-30 20077
2014-09-30 19795
2014-12-31 18804
2015-03-31 22615
2015-06-30 23483
2015-09-30 20009
2015-12-31 16644
2016-03-31 19216
2016-06-30 16694
2016-09-30 14398
2016-12-31 15651
2017-03-31 18277
2017-06-30 16113
2017-09-30 17175
2017-12-31 18805
2018-03-31 19657
2018-06-30 13037
2018-09-30 15719
2018-12-31 12197
2019-03-31 15867
2019-06-30 14974
2019-09-30 16446
2019-12-31 15354
2020-03-31 19413
2020-06-30 17809
2020-09-30 18168
2020-12-31 20381
2021-03-31 20161
2021-06-30 20845
2021-09-30 19589
2021-12-31 16094
2022-03-31 20842
2022-06-30 19020
2022-09-30 17917
2022-12-31 16728
2023-03-31 20154
2023-06-30 17594
2023-09-30 17017