Year	%
1996	68.49
1999	69.12
2001	69.12
2002	69.12
2003	69.12
2004	69.25
2005	69.25
2006	69.25
2007	69.15
2008	69.15
2010	69.25
2011	69.25
2012	69.15
2013	69.15
2021	68.27