Year	%
2008	7.97505918376389
2009	9.65606140421304
2010	10.70039580593
2011	11.1624793770948
2012	10.8256858254525
2013	10.2542710109923
2014	10.3622692760696
2015	9.7131702028711
2016	9.84390824703115
2017	9.68182103767315
2018	10.181958828354
2019	9.42407147872485
2020	8.17611450836364
2021	8.01734749845187