Year	Percent
1979-01-01	61.029500000000000
1980-01-01	59.318000000000005
1981-01-01	57.542800000000000
1982-01-01	58.702900000000000
1983-01-01	67.227000000000000
1984-01-01	62.342200000000000
1985-01-01	64.105800000000000
1986-01-01	66.644900000000000
1987-01-01	61.141600000000000
1988-01-01	55.359100000000000
1989-01-01	62.973400000000000
1990-01-01	64.644200000000000
1991-01-01	70.897800000000000
1992-01-01	71.472200000000000
1993-01-01	74.697800000000000
1994-01-01	72.597900000000000
1995-01-01	75.964400000000000
1996-01-01	78.009500000000000
1997-01-01	76.254200000000000
1998-01-01	79.838100000000000
1999-01-01	83.482000000000010
2000-01-01	88.738200000000000
2001-01-01	91.477400000000000
2002-01-01	91.767200000000000
2003-01-01	102.199000000000000
2004-01-01	106.997999999999990
2005-01-01	109.651000000000010
2006-01-01	105.027999999999990
2007-01-01	111.451000000000010
2008-01-01	107.844000000000000
2009-01-01	110.547999999999990
2010-01-01	117.525000000000000
2011-01-01	122.200000000000000
2012-01-01	138.363000000000000
2013-01-01	144.516000000000000
2014-01-01	149.303000000000000
2015-01-01	154.157000000000000
2016-01-01	154.205000000000000