Year	Percent
2000	26
2001	28
2002	27
2003	27
2004	27
2005	27
2006	28
2007	28
2008	31
2009	33
2010	32
2011	34
2012	33
2013	34
2014	33
2015	32
2016	32
2017	32
2018	32
2019	34
2020	29