Year	%
2002	4.01
2003	4.93
2004	4.93
2005	4.31
2006	4.3
2007	3.82
2008	3.7
2009	4.25
2010	4.32
2011	4.32
2012	4.05
2013	4.23
2014	3.74
2015	3.69
2016	3.69
2017	3.54
2018	3.28
2019	3.2
2020	3.77
2021	3.76