Year	Percent
2001	13.68722
2002	14.41255
2003	14.27135
2004	14.6359
2005	13.80928
2006	14.21312
2007	15.69439
2008	16.11567
2009	14.9941
2010	15.53359
2011	14.82327
2012	14.4135
2013	15.38428