Year	%
1998	91.71903
1999	96.58803
2000	93.65213
2001	92.95913
2002	92.68785
2003	91.97885
2004	90.40371
2006	88.37674
2007	89.12541
2008	90.01479
2009	91.66553
2010	92.5832
2011	94.53467