Year	%
2005	4.91
2007	4.43
2008	4.44
2009	4.44
2011	4.44
2012	3.72
2013	3.83
2014	3.71
2015	3.46
2016	3.63
2017	3.69
2018	3.26
2019	3.52
2020	3.54
2021	3.22