Year	Percent
2000	65.99695
2001	88.5164
2002	93.85998
2003	67.52584
2004	66.83042
2005	55.71473
2006	47.22463
2007	38.00657
2008	23.62862
2009	21.96544
2010	16.58979
2011	13.66094
2012	13.52375
2013	12.45463
2014	9.96953
2015	11.32218