Year	%
1999	69.88
2000	69.88
2001	69.88
2002	67.94
2003	67.94
2004	67.94
2005	67.94
2006	67.94
2007	69.17
2008	69.18
2009	69.18
2011	69.18
2012	69.38
2013	69.38
2014	69.38
2015	71.47
2016	71.47
2017	71.45
2021	71.45