Year	%
1994	98.04792
1999	99.84972
2000	98.05275
2001	98.27963
2002	98.35642
2003	98.4277
2004	98.76293
2005	98.63859
2006	98.93325
2007	98.38398
2008	98.15463
2009	98.2471
2010	98.12576
2011	98.42495
2012	97.84004
2013	98.29446
2014	97.94245
2015	98.22016
2016	98.43494
2017	98.26174