Year	%
1999	99.2714
2000	98.91167
2001	99.40861
2002	99.60461
2003	99.66362
2004	98.84185
2005	98.523
2007	99.12862
2008	100
2009	100
2010	99.18415
2011	98.74297
2012	98.10421
2013	98.58969
2014	98.36512
2015	99.08818
2016	99.19535