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 0
1975-07-01 0
1975-10-01 23
1976-01-01 24
1976-04-01 24
1976-07-01 25
1976-10-01 0
1977-01-01 0
1977-04-01 4
1977-07-01 11
1977-10-01 12
1978-01-01 41
1978-04-01 44
1978-07-01 39
1978-10-01 40
1979-01-01 144
1979-04-01 388
1979-07-01 463
1979-10-01 548
1980-01-01 706
1980-04-01 1002
1980-07-01 1159
1980-10-01 1485
1981-01-01 1311
1981-04-01 985
1981-07-01 937
1981-10-01 1165
1982-01-01 1561
1982-04-01 1879
1982-07-01 2050
1982-10-01 1538
1983-01-01 1202
1983-04-01 896
1983-07-01 879
1983-10-01 1031
1984-01-01 1937
1984-04-01 2617
1984-07-01 4041
1984-10-01 7084
1985-01-01 8030
1985-04-01 8541
1985-07-01 9201
1985-10-01 7327
1986-01-01 7228
1986-04-01 7123
1986-07-01 6256
1986-10-01 5707
1987-01-01 4169
1987-04-01 3058
1987-07-01 4540
1987-10-01 5455
1988-01-01 5671
1988-04-01 6193
1988-07-01 4501
1988-10-01 4563
1989-01-01 5132
1989-04-01 5035
1989-07-01 4699
1989-10-01 5460
1990-01-01 5064
1990-04-01 6048
1990-07-01 7825
1990-10-01 7422
1991-01-01 8600
1991-04-01 10053
1991-07-01 11662
1991-10-01 13921
1992-01-01 13735
1992-04-01 16490
1992-07-01 16601
1992-10-01 16375
1993-01-01 16708
1993-04-01 15784
1993-07-01 21381
1993-10-01 20229
1994-01-01 20175
1994-04-01 18414
1994-07-01 19842
1994-10-01 21315
1995-01-01 24482
1995-04-01 25463
1995-07-01 23766
1995-10-01 25839
1996-01-01 24195
1996-04-01 29463
1996-07-01 24088
1996-10-01 27399
1997-01-01 26058
1997-04-01 23293
1997-07-01 24769
1997-10-01 26000
1998-01-01 32692
1998-04-01 32145
1998-07-01 37073
1998-10-01 40855
1999-01-01 32314
1999-04-01 33239
1999-07-01 34779
1999-10-01 34790
2000-01-01 38248
2000-04-01 40523
2000-07-01 40455
2000-10-01 50309
2001-01-01 63582
2001-04-01 58005
2001-07-01 64748
2001-10-01 58336
2002-01-01 52335
2002-04-01 69699
2002-07-01 69779
2002-10-01 75394
2003-01-01 84378
2003-04-01 93119
2003-07-01 100937
2003-10-01 108339
2004-01-01 108026
2004-04-01 110228
2004-07-01 117725
2004-10-01 126288
2005-01-01 118181
2005-04-01 112672
2005-07-01 126264
2005-10-01 122568
2006-01-01 132644
2006-04-01 142776
2006-07-01 135141
2006-10-01 151453
2007-01-01 155491
2007-04-01 177576
2007-07-01 171586
2007-10-01 207972
2008-01-01 254544
2008-04-01 266402
2008-07-01 251680
2008-10-01 225609
2009-01-01 199492
2009-04-01 233048
2009-07-01 229682
2009-10-01 243786
2010-01-01 255987
2010-04-01 238094
2010-07-01 275002
2010-10-01 263742
2011-01-01 314980
2011-04-01 303824
2011-07-01 281407
2011-10-01 279358
2012-01-01 293377
2012-04-01 267442
2012-07-01 285325
2012-10-01 272888
2013-01-01 278978
2013-04-01 301398
2013-07-01 316353
2013-10-01 334263
2014-01-01 326432
2014-04-01 318567
2014-07-01 307611
2014-10-01 273484
2015-01-01 265928
2015-04-01 259825
2015-07-01 236452
2015-10-01 220493
2016-01-01 259683
2016-04-01 265483
2016-07-01 280819
2016-10-01 276138
2017-01-01 270766
2017-04-01 255216
2017-07-01 250232
2017-10-01 254429
2018-01-01 258327
2018-04-01 246513