Year	%
2007	5.08
2008	5.08
2009	5.05
2010	5.15
2011	5.5
2012	5.47
2013	3.7
2014	3.73
2015	3.42
2016	3.14
2017	3.11
2018	2.99
2019	2.92
2020	2.95
2021	3.01