Year	Percent
1965-01-01	1.3834500000000000
1966-01-01	1.7988800000000000
1967-01-01	0.6638550000000000
1968-01-01	0.7741920000000000
1969-01-01	0.6710430000000001
1970-01-01	1.2035500000000000
1971-01-01	2.6275700000000000
1972-01-01	2.4291300000000000
1973-01-01	0.7882500000000000
1974-01-01	0.1369740000000000
1975-01-01	0.1309600000000000
1976-01-01	0.4179290000000000
1977-01-01	2.3181100000000000
1978-01-01	3.7280599999999997
1979-01-01	4.7415100000000000
1980-01-01	4.6638000000000000
1981-01-01	5.3960000000000000
1982-01-01	6.5910400000000000
1983-01-01	6.5705399999999990
1984-01-01	10.2639000000000000
1985-01-01	10.2295000000000000
1986-01-01	6.9749300000000005
1987-01-01	1.1973200000000002
1988-01-01	1.3198299999999998
1989-01-01	0.8213270000000000
1990-01-01	0.6628630000000000
1991-01-01	0.9040980000000000
1992-01-01	3.4535199999999997
1993-01-01	5.9384100000000000
1994-01-01	5.9369400000000000
1995-01-01	5.7364100000000000
1996-01-01	4.9397100000000000
1997-01-01	4.5465200000000000
1998-01-01	4.0279400000000000
1999-01-01	3.6799500000000000
2000-01-01	3.2652799999999997
2001-01-01	2.7587900000000003
2002-01-01	3.2322900000000003
2003-01-01	5.4498500000000000
2004-01-01	7.4096899999999990
2005-01-01	7.2501700000000000
2006-01-01	4.4044200000000000
2007-01-01	1.8907800000000000
2008-01-01	1.6714200000000001
2009-01-01	1.2371299999999998
2010-01-01	4.2111199999999990
2011-01-01	8.1935300000000000
2012-01-01	8.2878400000000000
2013-01-01	11.0301000000000000
2014-01-01	16.4508000000000000