Quarterly Millions of US Dollars
1971-01-01 0
1971-04-01 0
1971-07-01 0
1971-10-01 0
1972-01-01 0
1972-04-01 0
1972-07-01 0
1972-10-01 0
1973-01-01 0
1973-04-01 0
1973-07-01 0
1973-10-01 0
1974-01-01 0
1974-04-01 0
1974-07-01 0
1974-10-01 0
1975-01-01 0
1975-04-01 8
1975-07-01 8
1975-10-01 8
1976-01-01 8
1976-04-01 8
1976-07-01 8
1976-10-01 8
1977-01-01 8
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 31
1980-01-01 27
1980-04-01 31
1980-07-01 111
1980-10-01 87
1981-01-01 84
1981-04-01 82
1981-07-01 8
1981-10-01 0
1982-01-01 0
1982-04-01 0
1982-07-01 24
1982-10-01 140
1983-01-01 160
1983-04-01 259
1983-07-01 574
1983-10-01 467
1984-01-01 474
1984-04-01 396
1984-07-01 111
1984-10-01 94
1985-01-01 104
1985-04-01 165
1985-07-01 176
1985-10-01 277
1986-01-01 666
1986-04-01 955
1986-07-01 1447
1986-10-01 2133
1987-01-01 2345
1987-04-01 2030
1987-07-01 1743
1987-10-01 972
1988-01-01 731
1988-04-01 999
1988-07-01 1161
1988-10-01 1561
1989-01-01 1095
1989-04-01 740
1989-07-01 586
1989-10-01 345
1990-01-01 1224
1990-04-01 1551
1990-07-01 1758
1990-10-01 2266
1991-01-01 1695
1991-04-01 1488
1991-07-01 1604
1991-10-01 1824
1992-01-01 1991
1992-04-01 2318
1992-07-01 2330
1992-10-01 1872
1993-01-01 1441
1993-04-01 1725
1993-07-01 3032
1993-10-01 2669
1994-01-01 2786
1994-04-01 2226
1994-07-01 2346
1994-10-01 2355
1995-01-01 5040
1995-04-01 5675
1995-07-01 6280
1995-10-01 5941
1996-01-01 4704
1996-04-01 4343
1996-07-01 2082
1996-10-01 2223
1997-01-01 2066
1997-04-01 3074
1997-07-01 3889
1997-10-01 3947
1998-01-01 3355
1998-04-01 2409
1998-07-01 1954
1998-10-01 3636
1999-01-01 4179
1999-04-01 4181
1999-07-01 5127
1999-10-01 3259
2000-01-01 2977
2000-04-01 4147
2000-07-01 7566
2000-10-01 4979
2001-01-01 8922
2001-04-01 9169
2001-07-01 8482
2001-10-01 7155
2002-01-01 6222
2002-04-01 5644
2002-07-01 4739
2002-10-01 5941
2003-01-01 6655
2003-04-01 6585
2003-07-01 6255
2003-10-01 5123
2004-01-01 5596
2004-04-01 4989
2004-07-01 7084
2004-10-01 7233
2005-01-01 7419
2005-04-01 5688
2005-07-01 12150
2005-10-01 10721
2006-01-01 11256
2006-04-01 12146
2006-07-01 8826
2006-10-01 12669
2007-01-01 14892
2007-04-01 15436
2007-07-01 14821
2007-10-01 15124
2008-01-01 12252
2008-04-01 10438
2008-07-01 7483
2008-10-01 6118
2009-01-01 5450
2009-04-01 12364
2009-07-01 10496
2009-10-01 13047
2010-01-01 10999
2010-04-01 7204
2010-07-01 14494
2010-10-01 13032
2011-01-01 24369
2011-04-01 23727
2011-07-01 24451
2011-10-01 21561
2012-01-01 20805
2012-04-01 17696
2012-07-01 11491
2012-10-01 11747
2013-01-01 12119
2013-04-01 16800
2013-07-01 17146
2013-10-01 19612
2014-01-01 12332
2014-04-01 10684
2014-07-01 10100
2014-10-01 9330
2015-01-01 12031
2015-04-01 12083
2015-07-01 11584
2015-10-01 12908
2016-01-01 10339
2016-04-01 10182
2016-07-01 10666
2016-10-01 10811
2017-01-01 14606
2017-04-01 16097
2017-07-01 16279
2017-10-01 16581
2018-01-01 10930
2018-04-01 7963