Year	%
2007	9.34
2008	10.24
2009	9.55
2010	8.94
2011	8.33
2012	5.77
2013	4.73
2014	4.42
2015	4.02
2016	3.62
2017	3.63
2018	3.75
2019	3.02
2020	3.33
2021	3.94