Year	Percent
2000	9.4
2001	19.27
2002	25.2
2003	20.12
2004	20.29
2005	17.23
2006	16.53
2007	14.99
2008	19.16
2009	16.91
2010	17.46
2011	13.92
2012	14.92
2013	15.12
2014	16.42
2015	19.3
2016	20.11
2017	21.34
2018	22.63
2019	22.35
2020	23.09