Quarter	Millions of US Dollars
1967-04-01	0
1967-07-01	0
1967-10-01	0
1968-01-01	0
1968-04-01	0
1968-07-01	0
1968-10-01	0
1969-01-01	0
1969-04-01	0
1969-07-01	0
1969-10-01	0
1970-01-01	0
1970-04-01	0
1970-07-01	0
1970-10-01	0
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	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	21
1979-01-01	20
1979-04-01	20
1979-07-01	21
1979-10-01	0
1980-01-01	0
1980-04-01	0
1980-07-01	0
1980-10-01	51
1981-01-01	48
1981-04-01	42
1981-07-01	187
1981-10-01	239
1982-01-01	305
1982-04-01	358
1982-07-01	216
1982-10-01	240
1983-01-01	152
1983-04-01	77
1983-07-01	176
1983-10-01	183
1984-01-01	327
1984-04-01	318
1984-07-01	842
1984-10-01	1316
1985-01-01	1471
1985-04-01	1570
1985-07-01	1039
1985-10-01	1278
1986-01-01	1333
1986-04-01	1696
1986-07-01	1785
1986-10-01	1112
1987-01-01	1256
1987-04-01	960
1987-07-01	1623
1987-10-01	2775
1988-01-01	2844
1988-04-01	2800
1988-07-01	2835
1988-10-01	1935
1989-01-01	1520
1989-04-01	1914
1989-07-01	1367
1989-10-01	1355
1990-01-01	2088
1990-04-01	1850
1990-07-01	2480
1990-10-01	4126
1991-01-01	5969
1991-04-01	5899
1991-07-01	5493
1991-10-01	4142
1992-01-01	1153
1992-04-01	1482
1992-07-01	1870
1992-10-01	1775
1993-01-01	2032
1993-04-01	2614
1993-07-01	5195
1993-10-01	3804
1994-01-01	5341
1994-04-01	4326
1994-07-01	3822
1994-10-01	3698
1995-01-01	3261
1995-04-01	3434
1995-07-01	3814
1995-10-01	4183
1996-01-01	3698
1996-04-01	3410
1996-07-01	4236
1996-10-01	5520
1997-01-01	5834
1997-04-01	5635
1997-07-01	6655
1997-10-01	5655
1998-01-01	4682
1998-04-01	3958
1998-07-01	2897
1998-10-01	3560
1999-01-01	3800
1999-04-01	3958
1999-07-01	3910
1999-10-01	2976
2000-01-01	1853
2000-04-01	1286
2000-07-01	2120
2000-10-01	2652
2001-01-01	2755
2001-04-01	2936
2001-07-01	1713
2001-10-01	2278
2002-01-01	2094
2002-04-01	2390
2002-07-01	3183
2002-10-01	2744
2003-01-01	2597
2003-04-01	2409
2003-07-01	2037
2003-10-01	1744
2004-01-01	1475
2004-04-01	1669
2004-07-01	1854
2004-10-01	1389
2005-01-01	1445
2005-04-01	800
2005-07-01	121
2005-10-01	1169
2006-01-01	1155
2006-04-01	1127
2006-07-01	1236
2006-10-01	366
2007-01-01	417
2007-04-01	395
2007-07-01	849
2007-10-01	4073
2008-01-01	4260
2008-04-01	4247
2008-07-01	3290
2008-10-01	5263
2009-01-01	2001
2009-04-01	2989
2009-07-01	2647
2009-10-01	4902
2010-01-01	4860
2010-04-01	2652
2010-07-01	2922
2010-10-01	6090
2011-01-01	9236
2011-04-01	12932
2011-07-01	12682
2011-10-01	6754
2012-01-01	9365
2012-04-01	5972
2012-07-01	5803
2012-10-01	5666
2013-01-01	4669
2013-04-01	4761
2013-07-01	4889
2013-10-01	5008
2014-01-01	810
2014-04-01	2343
2014-07-01	2093
2014-10-01	3790
2015-01-01	6073
2015-04-01	6255
2015-07-01	6181
2015-10-01	4435
2016-01-01	4436
2016-04-01	3083
2016-07-01	2759
2016-10-01	2810