Year	%
2000	46.8
2001	46.6
2002	46.5
2003	46.4
2004	46.3
2005	46.1
2006	45.9
2007	45.6
2008	45.3
2009	45
2010	44.7
2011	44.5
2012	44.2
2013	43.9
2014	43.6
2015	43.3
2016	43.1
2017	42.8
2018	42.5
2019	42.2