Year	%
2008	9.68108503619065
2009	9.18286583755586
2010	8.96952417946048
2011	9.46066973557239
2012	9.52459619325938
2013	9.11580829564496
2014	9.08251625471953
2015	9.05790863162295
2016	9.10399726538651
2017	9.44402912215013
2018	9.61033604169124