Year	Percent
1973-01-01	60.42830000000000
1974-01-01	60.32280000000000
1975-01-01	61.02780000000000
1976-01-01	62.85660000000000
1977-01-01	64.94840000000000
1978-01-01	65.43000000000000
1979-01-01	66.16910000000000
1980-01-01	69.06430000000000
1981-01-01	75.38650000000000
1982-01-01	81.48480000000000
1983-01-01	86.65270000000000
1984-01-01	91.25630000000000
1985-01-01	97.51750000000000
1986-01-01	95.33210000000000
1987-01-01	88.35810000000000
1988-01-01	82.61110000000000
1989-01-01	82.99090000000000
1990-01-01	84.45860000000000
1991-01-01	86.64010000000000
1992-01-01	89.90230000000000
1993-01-01	87.97570000000000
1994-01-01	87.67710000000000
1995-01-01	92.76290000000000
1996-01-01	99.64720000000000
1997-01-01	103.41799999999999
1998-01-01	119.46100000000000
1999-01-01	124.05700000000000
2000-01-01	113.21900000000000
2001-01-01	131.20800000000000
2002-01-01	132.83300000000000
2003-01-01	128.75700000000000
2004-01-01	118.55900000000000
2005-01-01	109.31800000000000
2006-01-01	102.59299999999999
2007-01-01	99.37700000000001
2008-01-01	116.86100000000000
2009-01-01	122.83600000000000
2010-01-01	116.77000000000000
2011-01-01	123.84700000000001
2012-01-01	135.12900000000000
2013-01-01	143.73600000000000
2014-01-01	153.17700000000002
2015-01-01	153.09000000000000
2016-01-01	156.75600000000000