Year	%
2000	50.384413769111895
2001	50.25523039833995
2002	50.08547948489665
2003	49.91320216394227
2004	49.67509376670144
2005	49.380212377174985
2006	49.06721195182218
2007	48.703697902828104
2008	48.28945622294524
2009	47.897642166284676
2010	47.54532037637491
2011	47.22777343318628
2012	46.98931839547256
2013	46.78559786783257
2014	46.60497301296883
2015	46.46862136928526
2016	46.30711762817342
2017	46.13892047883284
2018	45.96721681807744
2019	45.83317261117731