Year	Percent
1983-01-01	7.567610000000000
1984-01-01	7.611860000000001
1985-01-01	10.994100000000000
1986-01-01	13.155700000000000
1987-01-01	11.954100000000000
1988-01-01	10.791900000000000
1989-01-01	13.127100000000000
1990-01-01	13.322900000000000
1991-01-01	11.412400000000000
1992-01-01	14.389700000000000
1993-01-01	17.341100000000000
1994-01-01	15.045800000000000
1995-01-01	31.045900000000000
1996-01-01	27.582800000000000
1997-01-01	27.757500000000000
1998-01-01	37.533300000000000
1999-01-01	47.050800000000000
2000-01-01	23.506000000000000
2001-01-01	31.009100000000000
2002-01-01	15.467300000000000
2003-01-01	11.945900000000000
2004-01-01	9.261300000000000
2005-01-01	12.704700000000000
2006-01-01	9.191300000000000
2007-01-01	9.846330000000000
2008-01-01	9.247060000000001
2009-01-01	10.288400000000000
2010-01-01	8.692760000000000
2011-01-01	7.587700000000000
2012-01-01	7.630139999999999
2013-01-01	13.893400000000000
2014-01-01	15.300800000000000
2015-01-01	17.887000000000000
2016-01-01	12.987800000000000