Year	%
1990	71.43427
1991	65.19398
1992	68.68164
1993	67.81289
1994	69.91075
1995	74.29016
1996	73.69192
1997	76.66238
1998	78.93345
1999	75.29654
2000	77.64986
2001	76.51487
2002	76.90848
2003	76.46788
2004	78.38869
2005	80.00375
2006	82.24978
2007	81.66039
2008	81.13477
2009	81.91137
2010	83.01964
2011	83.52479
2012	73.13349
2013	87.65609
2014	81.68693
2015	81.45609
2016	84.64194
2017	100