Year	Percent
2000	20.27898
2001	19.78833
2002	20.04152
2003	19.37685
2004	20.55692
2005	21.05815
2006	19.71786
2007	19.10707
2008	20.95113
2009	21.23265
2010	19.53787
2011	19.68944
2012	19.08144
2013	20.24086
2014	20.41683