Year	%
2000	44.92369317275667
2001	44.713505047393426
2002	44.49959235522106
2003	44.26944652509413
2004	43.97614897042173
2005	43.586899724045985
2006	43.184350315910336
2007	42.70297832089844
2008	42.187826390479074
2009	41.67307485468133
2010	41.231920343231735
2011	40.85371777995951
2012	40.59719062174414
2013	40.369443870233155
2014	40.23454987638512
2015	40.134201374891504
2016	40.03926009146001
2017	39.923912959657734
2018	39.83569316011084
2019	39.78519938891761