Year	Percent
2005-01-01	34.3179463196246
2006-01-01	34.9815761754953
2007-01-01	35.1000026306110
2008-01-01	34.1472418961368
2009-01-01	33.3911533080092
2010-01-01	33.2979883909597
2011-01-01	33.2713043966576
2012-01-01	33.7984241373403
2013-01-01	33.0747667173493
2014-01-01	32.0083779786450
2015-01-01	31.5711198818781
2016-01-01	31.1854603762664
2017-01-01	30.7527309251269