Year	%
1998	96.0553
1999	93.77654
2000	100
2001	96.84467
2002	96.45749
2003	97.68682
2004	97.30153
2005	97.77313
2006	97.96264
2007	96.59011
2008	96.49539
2009	100
2010	96.70027
2011	97.25756
2012	99.26181
2013	100
2014	89.67225
2015	96.06915
2016	97.82744
2017	97.11485