Year	%
2000	22.4
2001	22.4
2002	22.9
2003	23.1
2004	23.4
2005	23.4
2006	24.3
2007	25
2008	25.1
2009	25.3
2010	25.8
2011	26
2012	26.2
2013	26.4
2014	26.3
2015	26.3
2016	26
2017	25.6
2018	25.2
2019	24.9