Year	Percent
2004-01-01	0.408596
2005-01-01	0.613694
2006-01-01	7.055300
2007-01-01	18.046100
2008-01-01	9.232790
2009-01-01	16.541500
2010-01-01	23.358900
2011-01-01	18.869600
2012-01-01	17.197200
2013-01-01	21.189300
2014-01-01	23.178700
2015-01-01	24.966800
2016-01-01	28.600700
2017-01-01	40.407100