Year	%
2002	4.3
2003	4.52
2004	4.52
2005	4.71
2006	4.54
2007	4.11
2008	4.32
2009	3.9
2010	3.94
2011	3.94
2012	4.26
2013	4.07
2014	3.87
2015	3.78
2016	3.78
2017	5.16
2018	5.65
2019	5.39
2020	3.91
2021	3.75