Quarterly Millions of US Dollars
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 0
1976-10-01 0
1977-01-01 0
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 34
1979-01-01 160
1979-04-01 161
1979-07-01 164
1979-10-01 145
1980-01-01 64
1980-04-01 177
1980-07-01 261
1980-10-01 278
1981-01-01 303
1981-04-01 664
1981-07-01 861
1981-10-01 957
1982-01-01 1299
1982-04-01 943
1982-07-01 771
1982-10-01 932
1983-01-01 639
1983-04-01 732
1983-07-01 990
1983-10-01 863
1984-01-01 921
1984-04-01 762
1984-07-01 562
1984-10-01 1406
1985-01-01 1470
1985-04-01 1801
1985-07-01 1970
1985-10-01 1540
1986-01-01 1852
1986-04-01 1676
1986-07-01 1825
1986-10-01 1716
1987-01-01 1540
1987-04-01 1923
1987-07-01 2509
1987-10-01 2908
1988-01-01 2964
1988-04-01 2329
1988-07-01 1656
1988-10-01 1564
1989-01-01 1360
1989-04-01 1639
1989-07-01 1658
1989-10-01 1378
1990-01-01 2148
1990-04-01 1811
1990-07-01 1596
1990-10-01 1537
1991-01-01 602
1991-04-01 873
1991-07-01 1203
1991-10-01 1712
1992-01-01 2483
1992-04-01 2278
1992-07-01 2836
1992-10-01 3244
1993-01-01 2560
1993-04-01 3107
1993-07-01 11851
1993-10-01 12289
1994-01-01 15121
1994-04-01 15271
1994-07-01 16373
1994-10-01 15628
1995-01-01 11464
1995-04-01 13183
1995-07-01 16717
1995-10-01 19301
1996-01-01 19898
1996-04-01 19549
1996-07-01 23740
1996-10-01 26792
1997-01-01 26292
1997-04-01 27431
1997-07-01 22785
1997-10-01 41520
1998-01-01 44988
1998-04-01 43895
1998-07-01 39312
1998-10-01 16486
1999-01-01 13195
1999-04-01 21216
1999-07-01 25040
1999-10-01 27462
2000-01-01 30487
2000-04-01 63444
2000-07-01 63735
2000-10-01 68463
2001-01-01 68587
2001-04-01 32853
2001-07-01 32292
2001-10-01 25145
2002-01-01 34720
2002-04-01 40872
2002-07-01 43736
2002-10-01 45901
2003-01-01 40290
2003-04-01 39932
2003-07-01 40277
2003-10-01 39999
2004-01-01 36713
2004-04-01 71361
2004-07-01 74786
2004-10-01 75083
2005-01-01 76893
2005-04-01 46463
2005-07-01 38625
2005-10-01 37564
2006-01-01 37295
2006-04-01 22526
2006-07-01 26414
2006-10-01 25482
2007-01-01 26839
2007-04-01 29746
2007-07-01 26096
2007-10-01 36092
2008-01-01 33095
2008-04-01 35338
2008-07-01 33637
2008-10-01 24579
2009-01-01 26815
2009-04-01 21554
2009-07-01 23141
2009-10-01 23683
2010-01-01 22523
2010-04-01 21280
2010-07-01 25769
2010-10-01 21265
2011-01-01 23484
2011-04-01 24226
2011-07-01 17714
2011-10-01 19377
2012-01-01 17787
2012-04-01 18031
2012-07-01 23557
2012-10-01 28473
2013-01-01 34242
2013-04-01 36339
2013-07-01 32510
2013-10-01 38619
2014-01-01 43353
2014-04-01 43440
2014-07-01 46319
2014-10-01 39437
2015-01-01 34413
2015-04-01 34006
2015-07-01 39118
2015-10-01 38492
2016-01-01 41692
2016-04-01 67623
2016-07-01 59210
2016-10-01 67652
2017-01-01 63467
2017-04-01 45538
2017-07-01 47038
2017-10-01 35461
2018-01-01 32364
2018-04-01 35438