Year	Percent
2006	0.2339
2007	0.24999
2008	0.26236
2009	0.31423
2010	0.31285
2011	0.32902
2012	0.33063
2013	0.34097
2014	0.35797
2015	0.37869
2016	0.39946
2017	0.41832
2018	0.40859
2019	0.41432
2020	0.4361
2021	0.44704