Year	Percent
2000	47.00974
2001	31.32296
2002	29.29145
2003	33.91096
2004	46.84023
2005	63.68404
2006	66.64911
2007	71.48523
2008	39.83748
2009	47.84478
2010	47.97496
2011	36.06477
2012	39.43185
2013	41.8841
2014	32.41708
2015	41.66171
2016	39.30259
2017	41.24496