Year	Percent
2000	38
2001	39
2002	41
2003	40
2004	43
2005	43
2006	44
2007	45
2008	46
2009	47
2010	48
2011	49
2012	52
2013	52
2014	53
2015	55
2016	56
2017	58
2018	57
2019	60
2020	58