Year	Percent
2000	31.05007
2001	20.71193
2002	19.08749
2003	18.8819
2004	60.08074
2005	75.3153
2006	83.57415
2007	81.81095
2008	85.66
2009	78.92922
2010	78.75015
2011	83.48362
2012	84.23221
2013	79.75518
2014	69.79001
2015	56.86204
2016	44.81913