Year	Percent
2001	23.15373
2002	23.77056
2003	22.09173
2004	22.75511
2005	21.70502
2006	21.49566
2007	21.83583
2008	23.83647
2009	24.84461
2010	24.60522
2011	25.29102
2013	25.88022
2014	25.65823