Year	%
1999	100
2000	99.88632
2001	99.78637
2002	100
2003	100
2004	99.69607
2005	99.47135
2006	99.54291
2007	99.23348
2008	99.37605
2009	99.81243
2010	99.77818
2011	99.82513
2012	99.67959
2013	100
2014	99.75759
2015	100
2016	100