Year	%
2000	50.38551954771092
2001	50.25634140061619
2002	50.08659592140813
2003	49.91432219433401
2004	49.67620605285815
2005	49.38131480297816
2006	49.06831020107363
2007	48.704779284331664
2008	48.290515248778995
2009	47.898678098410194
2010	47.54632416566832
2011	47.22874797283753
2012	46.990264851071885
2013	46.78651629655434
2014	46.605866822403804
2015	46.469489545074566
2016	46.307959850762735
2017	46.139734587150315
2018	45.9680013730855
2019	45.83392750895293