Year	%
1984	87.96002
1985	89.93106
1986	95.28407
1988	96.5181
1989	96.98285
1990	98.1704
1991	97.21766
2001	98.83594
2002	98.45001
2005	99.62847
2006	99.89431
2008	97.94204
2010	97.43142
2011	100
2012	100
2013	100
2014	100
2017	100