Year	%
1998	97.75354
1999	93.30804
2000	96.47167
2001	95.38747
2002	95.03312
2003	96.13541
2004	95.75821
2005	96.3152
2006	96.91395
2007	94.80809
2008	95.06439
2009	97.05785
2010	95.15928
2011	96.34614
2012	98.32798
2013	99.15588
2014	89.36041
2015	95.35669
2016	97.59418
2017	96.2329