Year	Percent
2000	13.2942
2001	10.1987
2002	7.554
2003	8.8101
2004	9.4671
2005	14.6845
2006	11.1205
2007	9.385
2008	9.3756
2009	14.0008
2010	17.2169
2011	21.4994
2012	26.6641
2013	36.761
2014	34.5976
2015	31.1042
2016	31.8067
2017	22.9084