Quarter	Millions of US Dollars
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	0
1979-01-01	0
1979-04-01	25
1979-07-01	26
1979-10-01	26
1980-01-01	24
1980-04-01	4
1980-07-01	4
1980-10-01	4
1981-01-01	4
1981-04-01	0
1981-07-01	0
1981-10-01	0
1982-01-01	0
1982-04-01	0
1982-07-01	0
1982-10-01	0
1983-01-01	30
1983-04-01	61
1983-07-01	60
1983-10-01	59
1984-01-01	31
1984-04-01	0
1984-07-01	33
1984-10-01	87
1985-01-01	88
1985-04-01	89
1985-07-01	60
1985-10-01	0
1986-01-01	0
1986-04-01	0
1986-07-01	0
1986-10-01	32
1987-01-01	64
1987-04-01	414
1987-07-01	425
1987-10-01	458
1988-01-01	522
1988-04-01	374
1988-07-01	473
1988-10-01	538
1989-01-01	418
1989-04-01	152
1989-07-01	49
1989-10-01	138
1990-01-01	130
1990-04-01	132
1990-07-01	145
1990-10-01	0
1991-01-01	107
1991-04-01	156
1991-07-01	164
1991-10-01	1265
1992-01-01	1080
1992-04-01	1086
1992-07-01	2351
1992-10-01	1498
1993-01-01	1505
1993-04-01	2154
1993-07-01	1345
1993-10-01	1606
1994-01-01	1635
1994-04-01	1437
1994-07-01	1034
1994-10-01	430
1995-01-01	517
1995-04-01	28
1995-07-01	28
1995-10-01	228
1996-01-01	230
1996-04-01	330
1996-07-01	425
1996-10-01	212
1997-01-01	654
1997-04-01	668
1997-07-01	723
1997-10-01	680
1998-01-01	226
1998-04-01	361
1998-07-01	310
1998-10-01	415
1999-01-01	505
1999-04-01	457
1999-07-01	636
1999-10-01	502
2000-01-01	358
2000-04-01	606
2000-07-01	424
2000-10-01	1145
2001-01-01	1144
2001-04-01	1482
2001-07-01	1962
2001-10-01	1515
2002-01-01	1587
2002-04-01	1188
2002-07-01	1447
2002-10-01	3211
2003-01-01	2610
2003-04-01	3155
2003-07-01	3227
2003-10-01	2564
2004-01-01	2624
2004-04-01	1924
2004-07-01	1610
2004-10-01	2065
2005-01-01	1572
2005-04-01	1747
2005-07-01	1167
2005-10-01	1592
2006-01-01	1725
2006-04-01	3615
2006-07-01	4588
2006-10-01	3398
2007-01-01	3661
2007-04-01	2004
2007-07-01	1091
2007-10-01	1832
2008-01-01	2586
2008-04-01	5588
2008-07-01	6701
2008-10-01	7779
2009-01-01	6617
2009-04-01	4232
2009-07-01	3338
2009-10-01	2196
2010-01-01	1894
2010-04-01	3529
2010-07-01	5222
2010-10-01	6005
2011-01-01	5950
2011-04-01	8015
2011-07-01	6899
2011-10-01	6430
2012-01-01	7802
2012-04-01	5735
2012-07-01	5136
2012-10-01	4280
2013-01-01	2929
2013-04-01	2514
2013-07-01	5691
2013-10-01	5795
2014-01-01	6233
2014-04-01	7098
2014-07-01	5750
2014-10-01	6282
2015-01-01	6666
2015-04-01	5236
2015-07-01	5772
2015-10-01	5687
2016-01-01	6472
2016-04-01	8319
2016-07-01	7557
2016-10-01	6873
2017-01-01	5966
2017-04-01	5221
2017-07-01	3984
2017-10-01	4625
2018-01-01	4687
2018-04-01	3616