Year	%
2002	4.01
2003	4.94
2004	4.93
2005	4.11
2006	4.09
2007	4.13
2008	4.04
2009	4.28
2010	4.66
2011	4.66
2012	4.29
2013	4.31
2014	4
2015	3.8
2016	3.8
2017	3.91
2018	3.96
2019	4.13
2020	4.11
2021	4.11