Year	%
2000	24.6
2001	24.7
2002	24.9
2003	25
2004	25.3
2005	25.1
2006	24.9
2007	24.8
2008	24.7
2009	24.4
2010	24.1
2011	24.4
2012	24.1
2013	23.8
2014	23.8
2015	23.3
2016	22.9
2017	22.7
2018	22.3
2019	22.2