Year	Percent
1996-01-01	18.018300000000000
1997-01-01	14.034400000000000
1998-01-01	13.506900000000000
1999-01-01	17.221800000000000
2000-01-01	18.626100000000000
2001-01-01	18.081200000000000
2002-01-01	19.472700000000000
2003-01-01	26.798000000000002
2004-01-01	27.885800000000000
2005-01-01	37.294400000000000
2006-01-01	41.475700000000000
2007-01-01	33.064400000000000
2008-01-01	29.673400000000000
2009-01-01	28.418100000000000
2010-01-01	31.040900000000000
2011-01-01	31.453300000000000
2012-01-01	33.799900000000000
2013-01-01	32.951800000000000
2014-01-01	33.229500000000000