Quarter	Millions of US Dollars
1986-04-01	100
1986-07-01	100
1986-10-01	100
1987-01-01	100
1987-04-01	100
1987-07-01	100
1987-10-01	100
1988-01-01	173
1988-04-01	166
1988-07-01	429
1988-10-01	449
1989-01-01	900
1989-04-01	888
1989-07-01	1394
1989-10-01	1529
1990-01-01	1790
1990-04-01	1796
1990-07-01	1911
1990-10-01	1990
1991-01-01	1751
1991-04-01	1662
1991-07-01	1926
1991-10-01	2085
1992-01-01	1943
1992-04-01	2073
1992-07-01	2245
1992-10-01	1988
1993-01-01	1982
1993-04-01	1813
1993-07-01	1828
1993-10-01	1718
1994-01-01	1684
1994-04-01	1763
1994-07-01	1768
1994-10-01	1765
1995-01-01	1618
1995-04-01	1614
1995-07-01	1122
1995-10-01	1148
1996-01-01	1111
1996-04-01	1097
1996-07-01	120
1996-10-01	1099
1997-01-01	2284
1997-04-01	5076
1997-07-01	5211
1997-10-01	5832
1998-01-01	6788
1998-04-01	11771
1998-07-01	18379
1998-10-01	18275
1999-01-01	18037
1999-04-01	17830
1999-07-01	17917
1999-10-01	17538
2000-01-01	17411
2000-04-01	17131
2000-07-01	37446
2000-10-01	37585
2001-01-01	37313
2001-04-01	36777
2001-07-01	36910
2001-10-01	36656
2002-01-01	37156
2002-04-01	38306
2002-07-01	38274
2002-10-01	40104
2003-01-01	42259
2003-04-01	41190
2003-07-01	41244
2003-10-01	42535
2004-01-01	41767
2004-04-01	42950
2004-07-01	43736
2004-10-01	44182
2005-01-01	44860
2005-04-01	44743
2005-07-01	42422
2005-10-01	42438
2006-01-01	42431
2006-04-01	43413
2006-07-01	44581
2006-10-01	50337
2007-01-01	54321
2007-04-01	56451
2007-07-01	56969
2007-10-01	56680
2008-01-01	56689
2008-04-01	59298
2008-07-01	62247
2008-10-01	61623
2009-01-01	59623
2009-04-01	61843
2009-07-01	60644
2009-10-01	59638
2010-01-01	56108
2010-04-01	61929
2010-07-01	63158
2010-10-01	65026
2011-01-01	69834
2011-04-01	72799
2011-07-01	70055
2011-10-01	68773
2012-01-01	68590
2012-04-01	83619
2012-07-01	95656
2012-10-01	106169
2013-01-01	110551
2013-04-01	117480
2013-07-01	122187
2013-10-01	126474
2014-01-01	114396
2014-04-01	114818
2014-07-01	113812
2014-10-01	111663
2015-01-01	109996
2015-04-01	108593
2015-07-01	104295
2015-10-01	103628
2016-01-01	102786
2016-04-01	103691
2016-07-01	103911
2016-10-01	104789
2017-01-01	102446
2017-04-01	102152
2017-07-01	108494
2017-10-01	106387
2018-01-01	106791
2018-04-01	102058