Year	Percent
2008-01-01	3.1038300000000000
2009-01-01	3.5321300000000004
2010-01-01	3.3518900000000000
2011-01-01	6.9262800000000000
2012-01-01	12.9012000000000000
2013-01-01	17.6196000000000000
2014-01-01	18.7620000000000000
2015-01-01	20.8988000000000000
2016-01-01	18.2813000000000000