Year	Percent
2001	36
2002	28
2003	28
2004	32
2005	31
2006	37
2007	45
2008	53
2009	35
2010	42
2011	47
2012	51
2013	52
2014	55
2015	55
2016	52
2017	48
2018	51
2019	48
2020	42