Quarter	Millions of US Dollars
1978-01-01	25
1978-04-01	73
1978-07-01	79
1978-10-01	79
1979-01-01	104
1979-04-01	103
1979-07-01	148
1979-10-01	142
1980-01-01	136
1980-04-01	196
1980-07-01	200
1980-10-01	204
1981-01-01	197
1981-04-01	184
1981-07-01	224
1981-10-01	234
1982-01-01	213
1982-04-01	207
1982-07-01	199
1982-10-01	221
1983-01-01	197
1983-04-01	197
1983-07-01	242
1983-10-01	246
1984-01-01	308
1984-04-01	296
1984-07-01	330
1984-10-01	324
1985-01-01	384
1985-04-01	426
1985-07-01	468
1985-10-01	789
1986-01-01	830
1986-04-01	805
1986-07-01	769
1986-10-01	758
1987-01-01	787
1987-04-01	785
1987-07-01	787
1987-10-01	857
1988-01-01	848
1988-04-01	745
1988-07-01	974
1988-10-01	1011
1989-01-01	973
1989-04-01	876
1989-07-01	1091
1989-10-01	1102
1990-01-01	942
1990-04-01	658
1990-07-01	626
1990-10-01	638
1991-01-01	596
1991-04-01	583
1991-07-01	534
1991-10-01	479
1992-01-01	755
1992-04-01	776
1992-07-01	804
1992-10-01	761
1993-01-01	932
1993-04-01	942
1993-07-01	831
1993-10-01	814
1994-01-01	1077
1994-04-01	1154
1994-07-01	1234
1994-10-01	1243
1995-01-01	1423
1995-04-01	1506
1995-07-01	1447
1995-10-01	1341
1996-01-01	1603
1996-04-01	1555
1996-07-01	1469
1996-10-01	1688
1997-01-01	1514
1997-04-01	2184
1997-07-01	2049
1997-10-01	1993
1998-01-01	1978
1998-04-01	2045
1998-07-01	2064
1998-10-01	2101
1999-01-01	2064
1999-04-01	2091
1999-07-01	1968
1999-10-01	1998
2000-01-01	1796
2000-04-01	2159
2000-07-01	1765
2000-10-01	1998
2001-01-01	1906
2001-04-01	2109
2001-07-01	2190
2001-10-01	2130
2002-01-01	1681
2002-04-01	1769
2002-07-01	2987
2002-10-01	2706
2003-01-01	2678
2003-04-01	2881
2003-07-01	2528
2003-10-01	2725
2004-01-01	2189
2004-04-01	3053
2004-07-01	3108
2004-10-01	3408
2005-01-01	3379
2005-04-01	4072
2005-07-01	3209
2005-10-01	3073
2006-01-01	2993
2006-04-01	3517
2006-07-01	3675
2006-10-01	2955
2007-01-01	2958
2007-04-01	1334
2007-07-01	1381
2007-10-01	1192
2008-01-01	1113
2008-04-01	844
2008-07-01	846
2008-10-01	906
2009-01-01	683
2009-04-01	701
2009-07-01	748
2009-10-01	595
2010-01-01	589
2010-04-01	620
2010-07-01	660
2010-10-01	676
2011-01-01	664
2011-04-01	373
2011-07-01	390
2011-10-01	387
2012-01-01	366
2012-04-01	377
2012-07-01	386
2012-10-01	348
2013-01-01	318
2013-04-01	101
2013-07-01	102
2013-10-01	95
2014-01-01	97
2014-04-01	99
2014-07-01	91
2014-10-01	84
2015-01-01	83
2015-04-01	50
2015-07-01	150
2015-10-01	100
2016-01-01	150
2016-04-01	150
2016-07-01	272
2016-10-01	255
2017-01-01	150
2017-04-01	150
2017-07-01	130
2017-10-01	130