Year	%
2000	46.06154450694634
2001	45.75354504464994
2002	45.52652564430192
2003	45.31828582780226
2004	45.05379781176723
2005	44.70368613205863
2006	44.35675915493357
2007	43.967126508341806
2008	43.539048303630224
2009	43.07488904150577
2010	42.674990785312765
2011	42.313323738793486
2012	41.961377742682366
2013	41.670713638636556
2014	41.40770296187757
2015	41.16142432014716
2016	40.99680176701242
2017	40.91137846947961
2018	40.767282246418375
2019	40.6708611791639