Year	%
1998	90.53997
1999	93.59169
2000	92.01975
2001	90.50348
2002	91.55488
2003	91.20814
2004	90.06002
2006	88.36898
2007	89.46578
2008	90.25329
2009	92.32814
2010	93.3876
2011	94.37356