Year	%
1984	82.44506
1985	85.9042
1986	93.64231
1988	95.55938
1989	95.73757
1990	96.8402
1991	95.85294
2001	98.01996
2002	97.64102
2005	98.95881
2006	99.00839
2008	96.76701
2010	100
2011	96.99383
2012	99.45102
2013	99.4719
2014	99.45562
2017	98.88381