Year	%
2002	4.01
2003	4.93
2004	4.93
2005	4.93
2006	4.94
2007	4.37
2008	4.27
2009	4.41
2010	4.32
2011	4.32
2012	4.11
2013	4.29
2014	4.3
2015	4.4
2016	4.4
2017	3.97
2018	3.64
2019	3.53
2020	4.05
2021	4.12