Year	%
1971	90.6326
1973	97.00558
1974	95.50636
1999	96.86761
2000	85.3432
2001	96.92867
2002	90.57211
2003	94.36778
2004	97.44295
2005	96.68934
2007	99.92953
2008	95.75296
2011	93.36263
2012	88.37117
2013	88.56477
2014	98.24089
2016	93.13518
2017	93.71321