Year	%
2007	4.82
2008	5.23
2009	5.21
2010	5.23
2011	5.22
2012	5.3
2013	4.2
2014	4.08
2015	3.96
2016	3.85
2017	3.8
2018	3.77
2019	3.75
2020	3.66
2021	3.75