Year	%
2000	15.385292155655357
2001	14.943145320486138
2002	14.672070535961906
2003	14.417871441958551
2004	13.821243459769454
2005	13.603677599034286
2006	13.19694855080081
2007	13.022968113191816
2008	12.740115308940325
2009	12.593111162264421
2010	12.336166712385348
2011	12.166567305374677
2012	12.056807124085696
2013	11.80706158382278
2014	11.48670889805467
2015	11.544932432875536
2016	11.296422806859857
2017	11.126293586336473
2018	11.016259346448699
2019	10.85366522372315