Year	%
2007	18.75
2008	19.29
2009	18.89
2010	18.75
2011	17.19
2012	16.72
2013	16.7
2014	16.96
2015	16.92
2016	16.96
2017	19.94
2018	19.32
2019	19.35
2020	20.81
2021	20.81