Year	%
2000	43.68134481276464
2001	43.382498670081404
2002	43.152796999538474
2003	42.918759354521605
2004	42.63312722202589
2005	42.266625054916275
2006	41.88671923346771
2007	41.462043778979776
2008	41.01284475755032
2009	40.544399228980204
2010	40.11698088412348
2011	39.76989765518853
2012	39.467150070697656
2013	39.24304812306916
2014	39.04659042872914
2015	38.90819310810814
2016	38.84000777931797
2017	38.7832987784677
2018	38.69776515500884
2019	38.672680972727825