Year	Percent
1978-01-01	0.2844180000000000000
1979-01-01	0.2576469999999999600
1980-01-01	0.1861820000000000000
1981-01-01	0.1331210000000000200
1982-01-01	0.0986600000000000000
1983-01-01	0.0767470000000000100
1984-01-01	0.0495769999999999960
1985-01-01	0.0261660000000000020
1986-01-01	0.0023420000000000003
1987-01-01	0.0004340000000000000
1988-01-01	0.2003030000000000000
1989-01-01	0.1843110000000000000
1990-01-01	0.1563830000000000000
1991-01-01	0.1596140000000000000
1992-01-01	0.1473380000000000200
1993-01-01	0.2237780000000000300
1994-01-01	0.2411449999999999700
1995-01-01	0.2003410000000000200
1996-01-01	0.3077630000000000000
1997-01-01	0.1969460000000000000
1998-01-01	0.0993830000000000000
1999-01-01	0.4956190000000000000
2000-01-01	0.3215270000000000000
2001-01-01	0.4337260000000000000
2002-01-01	0.0389570000000000000
2003-01-01	0.3543659999999999600
2004-01-01	0.3216870000000000000
2005-01-01	0.1868750000000000000
2006-01-01	0.1706820000000000000
2007-01-01	0.1985190000000000000
2008-01-01	0.1823920000000000000
2009-01-01	0.3539120000000000000
2010-01-01	0.2756920000000000000
2011-01-01	0.4307950000000000000
2012-01-01	0.4997029999999999500
2013-01-01	0.5114120000000000000
2014-01-01	0.2929870000000000000
2015-01-01	0.3481039999999999700
2016-01-01	0.3481039999999999700
2017-01-01	0.0000000000000000000