Year	%
2002	3.99
2003	4.94
2004	4.94
2005	4.28
2006	4.35
2007	4.15
2008	4.15
2009	3.62
2010	4.73
2011	4.73
2012	4.34
2013	4.37
2014	4.01
2015	3.97
2016	3.97
2017	3.97
2018	3.97
2019	3.98
2020	3.98
2021	3.95