Year	%
2002	4.3
2003	4.52
2004	4.52
2005	3.91
2006	3.74
2007	3.53
2008	3.98
2009	2.87
2010	3.94
2011	3.94
2012	4.15
2013	3.93
2014	3.14
2015	2.96
2016	2.96
2017	4.34
2018	4.77
2019	4.51
2020	3.01
2021	2.85