Year	%
1989	93.98576
1997	97.23791
1998	97.23895
2001	98.2624
2002	97.9413
2003	96.9874
2004	92.28413
2005	98.75541
2006	98.05318
2007	99.06034
2008	98.89234
2014	97.44923
2015	96.58693
2016	96.59469