Year	Percent
1975-01-01	16.62190000000000
1976-01-01	13.48270000000000
1977-01-01	12.65140000000000
1978-01-01	25.18940000000000
1979-01-01	18.19270000000000
1980-01-01	16.83300000000000
1981-01-01	19.45270000000000
1982-01-01	23.12840000000000
1983-01-01	23.88220000000000
1984-01-01	18.78610000000000
1985-01-01	29.27960000000000
1986-01-01	43.32890000000000
1987-01-01	53.39580000000000
1988-01-01	33.90650000000000
1989-01-01	40.57940000000000
1990-01-01	34.34070000000000
1991-01-01	37.34680000000000
1992-01-01	32.78510000000000
1993-01-01	42.04520000000000
1994-01-01	44.67050000000000
1995-01-01	42.01420000000000
1996-01-01	50.15040000000000
1997-01-01	66.19790000000000
1998-01-01	73.03560000000000
1999-01-01	59.27500000000000
2000-01-01	78.59450000000000
2001-01-01	75.78970000000000
2002-01-01	93.27280000000000
2003-01-01	87.53100000000000
2004-01-01	86.55930000000000
2005-01-01	76.48270000000000
2006-01-01	95.73850000000000
2007-01-01	107.71799999999999
2008-01-01	108.21900000000000
2009-01-01	76.95940000000000
2010-01-01	71.62290000000000
2011-01-01	74.51450000000000
2012-01-01	66.17750000000000
2013-01-01	53.04240000000000
2014-01-01	53.22690000000000