Year	Percent
2000	36.48026
2001	37.23602
2002	41.66947
2003	36.04503
2004	32.42741
2005	32.29733
2006	32.32234
2007	30.51833
2008	32.93389
2009	38.97334
2011	37.75878
2012	41.36357
2013	43.85232
2014	37.10283