Year	%
2005	4.37
2007	4.17
2008	4.2
2009	4.2
2011	4.7
2012	4.29
2013	4.32
2014	4.05
2015	4.03
2016	4.04
2017	4.15
2018	4.05
2019	4.07
2020	4.07
2021	4