Year	Percent
2000	26
2001	23
2002	26
2003	29
2004	28
2005	29
2006	32
2007	30
2008	29
2009	30
2010	33
2011	38
2012	41
2013	43
2014	44
2015	49
2016	58
2017	54
2018	63
2019	68
2020	43