Year	%
2007	7.48
2008	9.24
2009	9.16
2010	9.27
2011	9.18
2012	9.04
2013	7.43
2014	7.09
2015	6.77
2016	6.45
2017	6.31
2018	6.23
2019	6.2
2020	5.86
2021	6.2