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 0
1976-01-01 0
1976-04-01 0
1976-07-01 10
1976-10-01 10
1977-01-01 10
1977-04-01 10
1977-07-01 0
1977-10-01 0
1978-01-01 28
1978-04-01 54
1978-07-01 61
1978-10-01 61
1979-01-01 30
1979-04-01 105
1979-07-01 220
1979-10-01 221
1980-01-01 238
1980-04-01 190
1980-07-01 75
1980-10-01 154
1981-01-01 603
1981-04-01 650
1981-07-01 808
1981-10-01 767
1982-01-01 339
1982-04-01 503
1982-07-01 576
1982-10-01 887
1983-01-01 808
1983-04-01 593
1983-07-01 513
1983-10-01 338
1984-01-01 369
1984-04-01 374
1984-07-01 514
1984-10-01 932
1985-01-01 1205
1985-04-01 1842
1985-07-01 1896
1985-10-01 1849
1986-01-01 1871
1986-04-01 1386
1986-07-01 1468
1986-10-01 1339
1987-01-01 1675
1987-04-01 1847
1987-07-01 1725
1987-10-01 2026
1988-01-01 1978
1988-04-01 2207
1988-07-01 2260
1988-10-01 3038
1989-01-01 2875
1989-04-01 2682
1989-07-01 3499
1989-10-01 3806
1990-01-01 4232
1990-04-01 5671
1990-07-01 5640
1990-10-01 6240
1991-01-01 6567
1991-04-01 6774
1991-07-01 8512
1991-10-01 8076
1992-01-01 8307
1992-04-01 7588
1992-07-01 7296
1992-10-01 7535
1993-01-01 7745
1993-04-01 7172
1993-07-01 25638
1993-10-01 23363
1994-01-01 23232
1994-04-01 20839
1994-07-01 17844
1994-10-01 18325
1995-01-01 19932
1995-04-01 21066
1995-07-01 22972
1995-10-01 22841
1996-01-01 22502
1996-04-01 20451
1996-07-01 17099
1996-10-01 26905
1997-01-01 27228
1997-04-01 29542
1997-07-01 28214
1997-10-01 23836
1998-01-01 25275
1998-04-01 22689
1998-07-01 24487
1998-10-01 23567
1999-01-01 24107
1999-04-01 20985
1999-07-01 23039
1999-10-01 25040
2000-01-01 27831
2000-04-01 25830
2000-07-01 28006
2000-10-01 31090
2001-01-01 28584
2001-04-01 28439
2001-07-01 30241
2001-10-01 27531
2002-01-01 32639
2002-04-01 34081
2002-07-01 35996
2002-10-01 39582
2003-01-01 38113
2003-04-01 41715
2003-07-01 45763
2003-10-01 50215
2004-01-01 50631
2004-04-01 47378
2004-07-01 55015
2004-10-01 59529
2005-01-01 58425
2005-04-01 63771
2005-07-01 60648
2005-10-01 65560
2006-01-01 73887
2006-04-01 84442
2006-07-01 85533
2006-10-01 91174
2007-01-01 88054
2007-04-01 102204
2007-07-01 109210
2007-10-01 106170
2008-01-01 150135
2008-04-01 131319
2008-07-01 124076
2008-10-01 97006
2009-01-01 77202
2009-04-01 85756
2009-07-01 76087
2009-10-01 86332
2010-01-01 85572
2010-04-01 97795
2010-07-01 101198
2010-10-01 104097
2011-01-01 106559
2011-04-01 109636
2011-07-01 106070
2011-10-01 111055
2012-01-01 99245
2012-04-01 98192
2012-07-01 101638
2012-10-01 101441
2013-01-01 104195
2013-04-01 95554
2013-07-01 111586
2013-10-01 117911
2014-01-01 114181
2014-04-01 112119
2014-07-01 107753
2014-10-01 98040
2015-01-01 89425
2015-04-01 89019
2015-07-01 75277
2015-10-01 97688
2016-01-01 117483
2016-04-01 117403
2016-07-01 122484
2016-10-01 107026
2017-01-01 93447
2017-04-01 94732
2017-07-01 79789
2017-10-01 73391
2018-01-01 75940
2018-04-01 69804