Year	%
2000	43.6
2001	43.4
2002	43.3
2003	43.1
2004	43
2005	42.9
2006	42.9
2007	42.9
2008	42.9
2009	43
2010	43
2011	43
2012	43
2013	42.9
2014	42.9
2015	42.8
2016	42.5
2017	42.3
2018	42
2019	41.7