Year	%
1983	86.01314
1984	86.53229
1985	86.76316
1986	83.10997
1987	84.78703
1988	86.44414
1989	86.34443
1990	87.75238
1992	90.6795
1993	91.71548
2000	92.31886
2001	92.57058
2002	97.15344
2003	99.09905
2004	90.968
2005	89.00199
2006	96.12427
2007	97.77892
2008	99.37072
2009	96.42986
2010	97.32675
2011	97.0223
2016	95.73712