Year	%
2000	23.1
2001	22.8
2002	22.7
2003	22.7
2004	23.1
2005	23.4
2006	23.6
2007	24.3
2008	24.7
2009	24.9
2010	25
2011	25.4
2012	25.4
2013	25.5
2014	25.4
2015	25.3
2016	25
2017	24.9
2018	24.2
2019	24.2