Quarter	Millions of US Dollars
1972-07-01	31
1972-10-01	66
1973-01-01	70
1973-04-01	76
1973-07-01	76
1973-10-01	108
1974-01-01	111
1974-04-01	109
1974-07-01	106
1974-10-01	135
1975-01-01	137
1975-04-01	137
1975-07-01	131
1975-10-01	131
1976-01-01	133
1976-04-01	182
1976-07-01	227
1976-10-01	338
1977-01-01	341
1977-04-01	495
1977-07-01	498
1977-10-01	748
1978-01-01	775
1978-04-01	818
1978-07-01	1025
1978-10-01	1179
1979-01-01	1277
1979-04-01	1266
1979-07-01	1373
1979-10-01	1468
1980-01-01	1371
1980-04-01	1689
1980-07-01	1692
1980-10-01	1669
1981-01-01	1598
1981-04-01	1427
1981-07-01	1425
1981-10-01	1489
1982-01-01	1373
1982-04-01	1251
1982-07-01	1209
1982-10-01	1323
1983-01-01	1298
1983-04-01	1249
1983-07-01	1246
1983-10-01	1165
1984-01-01	1207
1984-04-01	1084
1984-07-01	1033
1984-10-01	916
1985-01-01	922
1985-04-01	927
1985-07-01	1061
1985-10-01	886
1986-01-01	975
1986-04-01	1058
1986-07-01	1129
1986-10-01	1006
1987-01-01	1011
1987-04-01	1003
1987-07-01	924
1987-10-01	904
1988-01-01	880
1988-04-01	613
1988-07-01	427
1988-10-01	408
1989-01-01	181
1989-04-01	167
1989-07-01	1172
1989-10-01	1000
1990-01-01	1000
1990-04-01	1000
1990-07-01	1000
1990-10-01	1000
1991-01-01	1000
1991-04-01	1000
1991-07-01	1000
1991-10-01	1000
1992-01-01	1000
1992-04-01	1000
1992-07-01	1000
1992-10-01	1000
1993-01-01	1000
1993-04-01	1000
1993-07-01	1000
1993-10-01	1000
1994-01-01	1000
1994-04-01	43786
1994-07-01	43786
1994-10-01	43786
1995-01-01	43786
1995-04-01	44729
1995-07-01	45305
1995-10-01	45259
1996-01-01	45497
1996-04-01	45684
1996-07-01	45807
1996-10-01	46497
1997-01-01	46975
1997-04-01	50136
1997-07-01	50551
1997-10-01	50515
1998-01-01	51488
1998-04-01	53197
1998-07-01	52845
1998-10-01	44208
1999-01-01	43972
1999-04-01	45643
1999-07-01	47027
1999-10-01	50118
2000-01-01	53189
2000-04-01	49165
2000-07-01	55950
2000-10-01	57469
2001-01-01	59158
2001-04-01	53972
2001-07-01	53190
2001-10-01	50942
2002-01-01	53287
2002-04-01	55302
2002-07-01	53986
2002-10-01	54144
2003-01-01	53862
2003-04-01	55511
2003-07-01	55725
2003-10-01	57520
2004-01-01	58792
2004-04-01	56469
2004-07-01	57991
2004-10-01	60354
2005-01-01	62404
2005-04-01	62294
2005-07-01	62251
2005-10-01	61193
2006-01-01	60395
2006-04-01	49532
2006-07-01	50742
2006-10-01	52345
2007-01-01	52932
2007-04-01	53944
2007-07-01	52753
2007-10-01	52394
2008-01-01	52374
2008-04-01	51801
2008-07-01	50060
2008-10-01	48968
2009-01-01	49762
2009-04-01	50757
2009-07-01	51932
2009-10-01	52531
2010-01-01	51023
2010-04-01	50862
2010-07-01	52796
2010-10-01	52013
2011-01-01	51016
2011-04-01	51333
2011-07-01	49287
2011-10-01	51229
2012-01-01	51091
2012-04-01	51774
2012-07-01	53123
2012-10-01	53084
2013-01-01	53185
2013-04-01	52913
2013-07-01	53503
2013-10-01	57987
2014-01-01	58239
2014-04-01	59797
2014-07-01	61790
2014-10-01	58864
2015-01-01	54602
2015-04-01	54874
2015-07-01	48300
2015-10-01	48292
2016-01-01	49267
2016-04-01	49590
2016-07-01	51086
2016-10-01	50990
2017-01-01	49560
2017-04-01	49077
2017-07-01	49229
2017-10-01	49817
2018-01-01	46831
2018-04-01	46310