Year	%
2000	29.343542234053235
2001	29.06601308152062
2002	28.719511209918668
2003	28.340466917998835
2004	27.004335206963486
2005	27.12171142094534
2006	27.461796359901545
2007	27.786482691420666
2008	28.073518876365625
2009	28.056791777863978
2010	28.317516653669966
2011	28.107409985589985
2012	27.59977581798018
2013	26.345800023832506
2014	25.433653910239435
2015	25.75350263955802
2016	25.699311181755853
2017	25.38109767397033
2018	25.11038028780574
2019	24.980798469710784