Year	%
1992	72.4759
1993	75.87256
1996	70.37426
1998	72.33791
1999	71.29949
2000	73.63184
2001	76.59693
2002	78.81945
2003	78.58312
2004	78.22015
2005	77.29854
2006	78.30887
2007	79.17592
2008	79.91547
2009	80.07291
2010	80.80497
2011	82.49992
2012	85.04635
2013	88.60642
2014	87.91759
2015	87.04355
2016	86.31434
2017	84.74015