Year	Percent
1999-01-01	1.4447100000000000
2000-01-01	1.2040200000000000
2001-01-01	3.8388600000000000
2002-01-01	2.0307700000000000
2003-01-01	2.5416600000000000
2004-01-01	2.5275000000000000
2005-01-01	2.1896500000000000
2006-01-01	3.1159700000000000
2007-01-01	3.6737100000000000
2008-01-01	3.6633699999999996
2009-01-01	6.4905200000000000
2010-01-01	5.4162500000000000
2011-01-01	5.7519599999999995
2012-01-01	6.5029200000000000
2013-01-01	7.4188899999999990
2014-01-01	6.3284800000000000
2015-01-01	5.9551099999999995
2016-01-01	5.7410300000000000