Year	%
1999	99.25235
2000	98.48861
2001	95.73649
2002	97.36478
2004	96.111
2007	99.68352
2008	99.14789
2009	99.85221
2011	97.98875
2012	100
2013	99.71336
2014	100
2015	99.73753
2016	99.56347
2017	99.74239