Year	%
1996	5.07
2000	4.4
2001	4.32
2003	4.49
2004	4.35
2005	4.35
2006	4.41
2007	3.83
2008	3.94
2009	3.93
2010	3.93
2011	3.93
2012	3.94
2013	9.37
2014	3.94
2015	4.81
2016	4.81
2020	4.71
2021	4.77