Year	Percent
1980-01-01	78.93790000000000
1981-01-01	83.46610000000000
1982-01-01	96.21580000000000
1983-01-01	101.17000000000000
1984-01-01	101.39299999999999
1985-01-01	100.63500000000000
1986-01-01	100.93500000000000
1987-01-01	104.83700000000000
1988-01-01	109.77799999999999
1989-01-01	116.98899999999999
1990-01-01	126.34899999999999
1991-01-01	130.04100000000000
1992-01-01	124.53600000000000
1993-01-01	122.64200000000001
1994-01-01	126.61800000000000
1995-01-01	124.71799999999999
1996-01-01	117.68900000000000
1997-01-01	116.45900000000000
1998-01-01	107.46600000000001
1999-01-01	66.17790000000000
2000-01-01	39.51500000000000
2001-01-01	39.82860000000000
2002-01-01	41.73170000000000
2003-01-01	47.19930000000000
2004-01-01	55.87580000000000
2005-01-01	63.70830000000000
2006-01-01	65.40410000000000
2007-01-01	66.46820000000000
2008-01-01	72.53260000000000
2009-01-01	75.02560000000000
2010-01-01	74.51500000000000
2011-01-01	79.31120000000000
2012-01-01	85.36399999999999
2013-01-01	90.74520000000000
2014-01-01	93.37650000000000
2015-01-01	93.52190000000000
2016-01-01	92.68030000000000