Year	%
2008	7.54273218486621
2009	8.08424274283095
2010	8.19847638274342
2011	7.81802025057591
2012	8.69342901326147
2013	9.09819450894361
2014	8.93797496385428
2015	9.36957556840662
2016	9.51434312460356
2017	10.0177818195465
2018	8.74212583250818
2019	8.52328344979497
2020	7.80919902161207
2021	6.74652828003407