Year	%
2005	4.68
2007	4.19
2008	4.2
2009	4.2
2011	4.44
2012	3.67
2013	3.8
2014	3.43
2015	3.19
2016	3.32
2017	3.53
2018	2.99
2019	3.23
2020	3.25
2021	2.92