Quarterly Millions of US Dollars
1972-10-01 20
1973-01-01 20
1973-04-01 20
1973-07-01 20
1973-10-01 20
1974-01-01 20
1974-04-01 20
1974-07-01 20
1974-10-01 20
1975-01-01 55
1975-04-01 55
1975-07-01 55
1975-10-01 55
1976-01-01 55
1976-04-01 55
1976-07-01 55
1976-10-01 97
1977-01-01 139
1977-04-01 141
1977-07-01 381
1977-10-01 503
1978-01-01 667
1978-04-01 736
1978-07-01 837
1978-10-01 908
1979-01-01 935
1979-04-01 939
1979-07-01 1097
1979-10-01 1164
1980-01-01 1025
1980-04-01 1129
1980-07-01 1163
1980-10-01 1100
1981-01-01 1039
1981-04-01 931
1981-07-01 963
1981-10-01 997
1982-01-01 930
1982-04-01 909
1982-07-01 833
1982-10-01 917
1983-01-01 899
1983-04-01 870
1983-07-01 853
1983-10-01 835
1984-01-01 871
1984-04-01 818
1984-07-01 716
1984-10-01 692
1985-01-01 702
1985-04-01 706
1985-07-01 802
1985-10-01 697
1986-01-01 751
1986-04-01 666
1986-07-01 713
1986-10-01 669
1987-01-01 669
1987-04-01 659
1987-07-01 482
1987-10-01 466
1988-01-01 451
1988-04-01 414
1988-07-01 353
1988-10-01 339
1989-01-01 318
1989-04-01 297
1989-07-01 242
1989-10-01 221
1990-01-01 128
1990-04-01 112
1990-07-01 117
1990-10-01 120
1991-01-01 115
1991-04-01 116
1991-07-01 588
1991-10-01 1502
1992-01-01 1980
1992-04-01 2662
1992-07-01 2737
1992-10-01 2476
1993-01-01 2395
1993-04-01 2823
1993-07-01 3549
1993-10-01 4389
1994-01-01 4452
1994-04-01 4442
1994-07-01 4454
1994-10-01 4373
1995-01-01 4214
1995-04-01 4225
1995-07-01 4299
1995-10-01 5073
1996-01-01 5901
1996-04-01 7811
1996-07-01 8740
1996-10-01 11847
1997-01-01 11930
1997-04-01 12965
1997-07-01 14871
1997-10-01 14993
1998-01-01 15784
1998-04-01 16235
1998-07-01 15684
1998-10-01 14995
1999-01-01 13981
1999-04-01 13652
1999-07-01 13858
1999-10-01 14087
2000-01-01 14321
2000-04-01 14632
2000-07-01 14495
2000-10-01 14152
2001-01-01 14331
2001-04-01 13545
2001-07-01 13455
2001-10-01 13554
2002-01-01 13162
2002-04-01 13098
2002-07-01 12783
2002-10-01 12035
2003-01-01 12116
2003-04-01 12589
2003-07-01 13353
2003-10-01 14339
2004-01-01 14994
2004-04-01 13745
2004-07-01 12648
2004-10-01 10774
2005-01-01 10141
2005-04-01 9516
2005-07-01 9605
2005-10-01 10420
2006-01-01 11987
2006-04-01 12550
2006-07-01 13916
2006-10-01 13759
2007-01-01 14330
2007-04-01 14151
2007-07-01 13355
2007-10-01 13380
2008-01-01 12794
2008-04-01 12652
2008-07-01 11670
2008-10-01 10679
2009-01-01 10339
2009-04-01 11814
2009-07-01 13646
2009-10-01 14440
2010-01-01 16961
2010-04-01 16908
2010-07-01 18408
2010-10-01 21361
2011-01-01 20594
2011-04-01 24731
2011-07-01 26651
2011-10-01 28303
2012-01-01 31160
2012-04-01 32180
2012-07-01 34631
2012-10-01 35525
2013-01-01 35969
2013-04-01 36957
2013-07-01 35361
2013-10-01 35735
2014-01-01 35267
2014-04-01 36259
2014-07-01 37158
2014-10-01 37704
2015-01-01 36098
2015-04-01 38074
2015-07-01 37779
2015-10-01 36847
2016-01-01 37130
2016-04-01 36510
2016-07-01 35894
2016-10-01 35122
2017-01-01 34267
2017-04-01 34266
2017-07-01 34433
2017-10-01 34981
2018-01-01 36187
2018-04-01 34761