Year	%
2000	50.3844137691119
2001	50.25523039833995
2002	50.085479484896666
2003	49.913202163942266
2004	49.67509376670144
2005	49.380212377174985
2006	49.06721195182219
2007	48.70369790282811
2008	48.28945622294524
2009	47.89764216628469
2010	47.5453203763749
2011	47.22777343318629
2012	46.98931839547256
2013	46.78559786783257
2014	46.60497301296882
2015	46.46862136928525
2016	46.30711762817342
2017	46.13892047883283
2018	45.96721681807744
2019	45.8331726111773