Year	%
1996	4.37
1997	4.37
1998	4.37
1999	4.37
2000	4.37
2001	4.2
2002	4.2
2003	4.16
2004	4.03
2005	3.98
2006	3.93
2007	3.77
2008	3.71
2010	3.3
2011	3.07
2012	4.37
2013	4.41
2015	1.86
2019	3.4
2021	2.89