Year	Percent
1999-01-01	32.300100000000000
2000-01-01	35.184200000000000
2001-01-01	35.472200000000000
2002-01-01	39.679300000000000
2003-01-01	44.181400000000000
2004-01-01	59.367300000000000
2005-01-01	37.483700000000000
2006-01-01	33.450600000000000
2007-01-01	36.445500000000000
2008-01-01	26.658100000000000
2009-01-01	19.707700000000000
2010-01-01	11.835900000000000
2011-01-01	15.328800000000000
2012-01-01	17.061700000000000
2013-01-01	14.080000000000000
2014-01-01	16.272100000000000
2015-01-01	9.701880000000001
2016-01-01	12.051700000000000