Year	Percent
2001	72.20132
2002	59.85272
2003	33.05127
2004	38.22794
2005	58.43525
2008	44.16047
2009	57.00656
2010	54.68883
2011	49.55951
2012	38.59069
2013	41.27157
2015	35.84083