Year	Percent
1978	95.70172
1979	99.9234
1980	99.36173
1983	98.03922
1995	74.71464
1996	79.64143
1997	77.09678
1998	88.64092
1999	86.76555
2000	86.95099
2001	91.9655
2002	99.35027
2003	100.95662
2004	97.77928
2005	96.14891
2015	98.3301
2016	93.59362