Year	Percent
1975-01-01	1.3362700000000000
1976-01-01	1.4858300000000000
1977-01-01	1.0223000000000000
1978-01-01	1.1980500000000000
1979-01-01	1.1846600000000000
1980-01-01	1.0420399999999999
1981-01-01	1.0744400000000000
1982-01-01	1.0241400000000000
1983-01-01	2.1703600000000000
1984-01-01	1.8678599999999999
1985-01-01	13.3586000000000000
1986-01-01	11.0062000000000000
1987-01-01	10.4665000000000000
1988-01-01	20.9854000000000000
1989-01-01	43.0719999999999960
1990-01-01	27.4813000000000000
1991-01-01	24.2873000000000000
1992-01-01	37.8460000000000000
1993-01-01	57.0632000000000000
1994-01-01	58.7252000000000000
1995-01-01	47.7088000000000000
1996-01-01	53.8300000000000000
1997-01-01	56.1173000000000000
1998-01-01	70.0324000000000000
1999-01-01	57.5867000000000000
2000-01-01	91.5699000000000000
2001-01-01	67.7589000000000000
2002-01-01	38.7977000000000000
2003-01-01	40.8525000000000000
2004-01-01	47.6098000000000000
2005-01-01	91.9124000000000000
2006-01-01	85.7598000000000000
2007-01-01	91.2973000000000000
2008-01-01	97.8675000000000000
2009-01-01	94.7219000000000000
2010-01-01	70.1946000000000000
2011-01-01	70.5704000000000000
2012-01-01	53.5175000000000000