Year	Percent
2002	46.5306
2003	44.30263
2004	44.51905
2005	44.47885
2006	45.83757
2007	46.08474
2008	46.68092
2009	46.21523
2010	46.0063
2011	47.39884
2012	48.10529
2013	48.83217
2014	49.01694
2015	50.25095
2016	49.96833
2017	49.3019