Year	Percent
2001	27.27497
2002	25.075
2003	24.92386
2004	24.39044
2005	21.91823
2006	21.02955
2007	20.49755
2008	20.65481
2009	23.90602
2010	23.66287
2011	25.11352
2012	22.6425
2013	20.96583
2014	21.81641