Year	%
2002	4.28
2003	4.98
2004	5.12
2005	5.02
2006	5.03
2007	4.43
2008	4.36
2009	4.49
2010	4.42
2011	4.42
2012	4.08
2013	4.23
2014	4.18
2015	4.27
2016	4.27
2017	4.7
2018	4.02
2019	3.77
2020	3.89
2021	3.95