Year	Percent
2001	35
2002	37
2003	41
2004	42
2005	40
2006	45
2007	45
2008	44
2009	45
2010	48
2011	50
2012	49
2013	50
2014	52
2015	52
2016	50
2017	53
2018	55
2019	59
2020	55