Year	Percent
1975-01-01	11.223300000000000
1976-01-01	13.023000000000000
1977-01-01	14.389700000000000
1978-01-01	16.180500000000000
1979-01-01	16.773600000000000
1980-01-01	15.622200000000000
1981-01-01	18.176900000000000
1982-01-01	17.787500000000000
1983-01-01	18.344800000000000
1984-01-01	22.514900000000000
1985-01-01	27.713600000000000
1986-01-01	43.473100000000000
1987-01-01	66.466500000000000
1988-01-01	78.377400000000000
1989-01-01	81.664900000000000
1990-01-01	64.769600000000000
1991-01-01	37.745300000000000
1992-01-01	21.866999999999997
1993-01-01	18.017500000000000
1994-01-01	21.029900000000000
1995-01-01	21.166000000000000
1996-01-01	22.540500000000000
1997-01-01	24.052100000000000
1998-01-01	24.907600000000000
1999-01-01	35.424100000000000
2000-01-01	47.320900000000000
2001-01-01	45.327800000000000
2002-01-01	41.053800000000000
2003-01-01	47.267400000000000
2004-01-01	61.853900000000000
2005-01-01	81.246000000000010
2006-01-01	106.260000000000000
2007-01-01	132.702000000000000
2008-01-01	136.887000000000000
2009-01-01	102.147000000000000
2010-01-01	73.762700000000000
2011-01-01	73.264100000000000
2012-01-01	61.918500000000000
2013-01-01	85.219900000000000
2014-01-01	108.542000000000000
2015-01-01	111.898000000000000
2016-01-01	115.401000000000010
2017-01-01	110.994000000000000