Year	Percent
1993-01-01	9.8708900000000000
1994-01-01	9.7066600000000010
1995-01-01	8.7572300000000000
1996-01-01	11.5816000000000000
1997-01-01	10.5266000000000000
1998-01-01	11.7307000000000000
1999-01-01	10.3137000000000000
2000-01-01	7.8515600000000010
2001-01-01	7.0285300000000000
2002-01-01	7.0671100000000004
2003-01-01	6.2782700000000000
2004-01-01	5.0822300000000000
2005-01-01	3.7310300000000005
2006-01-01	3.4659500000000000
2007-01-01	3.2418900000000000
2008-01-01	2.6667200000000000
2009-01-01	3.9984000000000000
2010-01-01	4.5388900000000000
2011-01-01	5.0848900000000010
2012-01-01	4.7594100000000000
2013-01-01	5.4245700000000000
2014-01-01	5.5177000000000000
2015-01-01	6.6732300000000000
2016-01-01	6.8127100000000010