Year	Percent
1979-01-01	10.958200000000000
1980-01-01	19.892800000000000
1981-01-01	35.507300000000000
1982-01-01	27.551300000000000
1983-01-01	22.270800000000000
1984-01-01	24.313200000000000
1985-01-01	13.821900000000000
1986-01-01	10.967100000000000
1987-01-01	23.681500000000000
1988-01-01	23.901999999999997
1989-01-01	30.897100000000000
1990-01-01	49.095700000000000
1991-01-01	46.142800000000000
1992-01-01	36.488700000000000
1993-01-01	83.887300000000000
1994-01-01	120.560000000000000
1995-01-01	91.193900000000000
1996-01-01	64.767600000000000
1997-01-01	65.632500000000000
1998-01-01	72.251700000000000
1999-01-01	95.722400000000000
2000-01-01	104.877000000000010
2001-01-01	91.341900000000000
2002-01-01	73.000200000000000
2003-01-01	81.922600000000000
2004-01-01	91.602400000000000
2005-01-01	89.709000000000000
2006-01-01	103.820000000000000
2007-01-01	158.652000000000020
2008-01-01	175.058000000000000
2009-01-01	129.523000000000000
2010-01-01	122.401000000000010
2011-01-01	110.885000000000000
2012-01-01	92.794700000000000
2013-01-01	88.349900000000000
2014-01-01	76.458700000000000
2015-01-01	62.937800000000000
2016-01-01	61.953100000000000
2017-01-01	62.910300000000000