Year	Percent
2000	13
2001	14
2002	16
2003	17
2004	20
2005	24
2006	27
2007	27
2008	28
2009	28
2010	29
2011	32
2012	31
2013	32
2014	35
2015	37
2016	42
2017	49
2018	57
2019	61
2020	74