Quarterly Millions of US Dollars
1977-04-01 0
1977-07-01 0
1977-10-01 0
1978-01-01 0
1978-04-01 0
1978-07-01 0
1978-10-01 0
1979-01-01 0
1979-04-01 0
1979-07-01 0
1979-10-01 0
1980-01-01 0
1980-04-01 0
1980-07-01 0
1980-10-01 0
1981-01-01 0
1981-04-01 50
1981-07-01 50
1981-10-01 50
1982-01-01 50
1982-04-01 0
1982-07-01 0
1982-10-01 0
1983-01-01 0
1983-04-01 0
1983-07-01 0
1983-10-01 0
1984-01-01 0
1984-04-01 30
1984-07-01 30
1984-10-01 30
1985-01-01 30
1985-04-01 0
1985-07-01 0
1985-10-01 0
1986-01-01 0
1986-04-01 0
1986-07-01 0
1986-10-01 31
1987-01-01 33
1987-04-01 33
1987-07-01 33
1987-10-01 30
1988-01-01 30
1988-04-01 30
1988-07-01 70
1988-10-01 140
1989-01-01 140
1989-04-01 140
1989-07-01 103
1989-10-01 763
1990-01-01 1464
1990-04-01 1569
1990-07-01 1645
1990-10-01 959
1991-01-01 205
1991-04-01 181
1991-07-01 397
1991-10-01 399
1992-01-01 458
1992-04-01 754
1992-07-01 704
1992-10-01 579
1993-01-01 620
1993-04-01 409
1993-07-01 356
1993-10-01 385
1994-01-01 380
1994-04-01 389
1994-07-01 541
1994-10-01 483
1995-01-01 595
1995-04-01 499
1995-07-01 652
1995-10-01 1701
1996-01-01 985
1996-04-01 1142
1996-07-01 611
1996-10-01 400
1997-01-01 1393
1997-04-01 1480
1997-07-01 1563
1997-10-01 1403
1998-01-01 2021
1998-04-01 2502
1998-07-01 4355
1998-10-01 4370
1999-01-01 3226
1999-04-01 2682
1999-07-01 1268
1999-10-01 2547
2000-01-01 3750
2000-04-01 3386
2000-07-01 3443
2000-10-01 4287
2001-01-01 4068
2001-04-01 4900
2001-07-01 7403
2001-10-01 7691
2002-01-01 7710
2002-04-01 8455
2002-07-01 9755
2002-10-01 11614
2003-01-01 13549
2003-04-01 18771
2003-07-01 18623
2003-10-01 18474
2004-01-01 20109
2004-04-01 23164
2004-07-01 21020
2004-10-01 21930
2005-01-01 20564
2005-04-01 17411
2005-07-01 20912
2005-10-01 23520
2006-01-01 24244
2006-04-01 29371
2006-07-01 30940
2006-10-01 32632
2007-01-01 31375
2007-04-01 36474
2007-07-01 37103
2007-10-01 39789
2008-01-01 44837
2008-04-01 46174
2008-07-01 38608
2008-10-01 39109
2009-01-01 38663
2009-04-01 51365
2009-07-01 59157
2009-10-01 50055
2010-01-01 54519
2010-04-01 41427
2010-07-01 42937
2010-10-01 36799
2011-01-01 40783
2011-04-01 41698
2011-07-01 45497
2011-10-01 46166
2012-01-01 37516
2012-04-01 30804
2012-07-01 22901
2012-10-01 25305
2013-01-01 25689
2013-04-01 28084
2013-07-01 30592
2013-10-01 37110
2014-01-01 36080
2014-04-01 26064
2014-07-01 21922
2014-10-01 15432
2015-01-01 10077
2015-04-01 10412
2015-07-01 9078
2015-10-01 14643
2016-01-01 14900
2016-04-01 13716
2016-07-01 13522
2016-10-01 9645
2017-01-01 11025
2017-04-01 17343
2017-07-01 15582
2017-10-01 11072
2018-01-01 10521
2018-04-01 12002