Year	%
1993	96.62982
1994	92.73645
1995	93.70083
1996	89.07673
1999	98.17793
2000	86.32005
2001	93.74136
2002	96.56175
2003	95.28829
2004	93.94237
2005	90.75017
2006	85.2723
2007	92.5274
2008	92.23317
2009	90.49744
2010	96.31959
2011	95.82228
2012	97.81582
2014	92.27363
2017	94.74082