Year	%
1994	86.77788
1995	92.14707
1996	92.53197
1997	91.16522
1998	89.82405
1999	90.57403
2000	91.47841
2001	92.35399
2002	93.23974
2003	94.23734
2004	95.3556
2005	96.35904
2006	97.28096
2007	98.21711
2008	98.2278
2009	98.17063
2010	98.21249
2011	97.93383
2012	97.15199
2013	95.76373
2014	98.1991
2015	98.27804
2016	98.64069
2017	98.69182