Year	%
2000	31.107990472978283
2001	30.456795345987555
2002	29.954540074264578
2003	29.45550347666291
2004	28.92226907192243
2005	28.307615884084044
2006	27.68154271455039
2007	27.045363380680705
2008	26.451726960260608
2009	25.85938138028395
2010	25.320062713825546
2011	24.95341818076551
2012	24.675523950763843
2013	24.534822123448976
2014	24.43422249355456
2015	24.443399865411838
2016	24.523447562949467
2017	24.488753309197335
2018	24.458203618301777
2019	24.505552357412277