Year	Percent
2005-01-01	69.0755581197573
2006-01-01	67.1119975309727
2007-01-01	66.2781950812562
2008-01-01	64.6089259138254
2009-01-01	63.4395958129032
2010-01-01	59.2336987023880
2011-01-01	56.7683457299356
2012-01-01	53.2262680418941
2013-01-01	53.0576054043622
2014-01-01	51.5666359372873
2015-01-01	51.3860949195773
2016-01-01	51.0059316505513
2017-01-01	49.3737181419653