Year	Percent
2005-01-01	31.5918258460163
2006-01-01	32.5162039095269
2007-01-01	32.7165734952840
2008-01-01	34.0938147411886
2009-01-01	31.1700241176130
2010-01-01	36.5558207148351
2011-01-01	37.5333442515659
2012-01-01	36.0451795645323
2013-01-01	35.3374799131329
2014-01-01	34.9850624390390
2015-01-01	35.1859713647323
2016-01-01	33.5526625980069
2017-01-01	31.8143818289778