Quarter	Millions of US Dollars
1976-10-01	35
1977-01-01	63
1977-04-01	63
1977-07-01	63
1977-10-01	64
1978-01-01	91
1978-04-01	91
1978-07-01	123
1978-10-01	123
1979-01-01	121
1979-04-01	121
1979-07-01	121
1979-10-01	122
1980-01-01	142
1980-04-01	147
1980-07-01	147
1980-10-01	144
1981-01-01	142
1981-04-01	138
1981-07-01	138
1981-10-01	140
1982-01-01	138
1982-04-01	135
1982-07-01	134
1982-10-01	136
1983-01-01	135
1983-04-01	134
1983-07-01	134
1983-10-01	133
1984-01-01	133
1984-04-01	131
1984-07-01	128
1984-10-01	126
1985-01-01	126
1985-04-01	126
1985-07-01	130
1985-10-01	132
1986-01-01	133
1986-04-01	133
1986-07-01	135
1986-10-01	101
1987-01-01	78
1987-04-01	76
1987-07-01	76
1987-10-01	82
1988-01-01	54
1988-04-01	52
1988-07-01	24
1988-10-01	25
1989-01-01	23
1989-04-01	23
1989-07-01	24
1989-10-01	25
1996-07-01	290
1996-10-01	286
1997-01-01	265
1997-04-01	255
1997-07-01	253
1997-10-01	250
1998-01-01	243
1998-04-01	248
1998-07-01	267
1998-10-01	267
1999-01-01	246
1999-04-01	379
1999-07-01	392
1999-10-01	369
2000-01-01	351
2000-04-01	351
2000-07-01	322
2000-10-01	342
2001-01-01	324
2001-04-01	312
2001-07-01	335
2001-10-01	324
2002-01-01	320
2002-04-01	366
2002-07-01	137
2002-10-01	145
2003-01-01	151
2003-04-01	158
2003-07-01	628
2003-10-01	680
2004-01-01	659
2004-04-01	486
2004-07-01	496
2004-10-01	545
2005-01-01	519
2005-04-01	484
2005-07-01	482
2005-10-01	472
2006-01-01	484
2006-04-01	509
2006-07-01	506
2006-10-01	527
2007-01-01	533
2007-04-01	1215
2007-07-01	1276
2007-10-01	1325
2008-01-01	1423
2008-04-01	1419
2008-07-01	715
2008-10-01	696
2009-01-01	665
2009-04-01	707
2009-07-01	732
2009-10-01	720
2010-01-01	674
2010-04-01	614
2010-07-01	682
2010-10-01	2004
2011-01-01	2131
2011-04-01	2168
2011-07-01	2025
2011-10-01	1941
2012-01-01	2003
2012-04-01	1889
2012-07-01	1940
2012-10-01	3479
2013-01-01	3421
2013-04-01	3462
2013-07-01	3526
2013-10-01	3869
2014-01-01	3868
2014-04-01	6764
2014-07-01	6568
2014-10-01	6456
2015-01-01	6104
2015-04-01	7213
2015-07-01	7370
2015-10-01	7287
2016-01-01	7352
2016-04-01	7279
2016-07-01	7294
2016-10-01	7447
2017-01-01	7486
2017-04-01	7102
2017-07-01	7184
2017-10-01	7223
2018-01-01	7290
2018-04-01	7158