Year	%
2000	25.73127044165614
2001	25.295609394292452
2002	25.083335576113715
2003	24.794824162792597
2004	24.559471935420802
2005	24.222010624133382
2006	23.962677800236076
2007	23.652946362074967
2008	23.471310990830194
2009	23.238760557864953
2010	22.973819565091674
2011	22.784249296113146
2012	22.491791885471635
2013	22.278816536245035
2014	22.11920240718093
2015	22.001745201321107
2016	21.88638694158418
2017	21.718570988210242
2018	21.679762582781194
2019	21.639529926755717