Year	%
1999	49.97
2000	49.97
2001	49.96
2002	49.83
2003	49.79
2004	49.75
2005	49.74
2006	49.73
2007	49.04
2008	50.08
2009	50.06
2011	50
2012	49.13
2013	49.12
2014	49.12
2015	55.55
2016	55.55
2017	55.86
2021	55.86