Year	%
2000	44.9
2001	44.7
2002	44.4
2003	44.3
2004	44.5
2005	44.6
2006	44.5
2007	44.4
2008	44.4
2009	44.5
2010	44.6
2011	44.7
2012	44.8
2013	44.9
2014	45
2015	45.6
2016	45.6
2017	45.8
2018	46.1
2019	46.3