Year	%
2000	22
2001	22.7
2002	23.3
2003	23.8
2004	23.7
2005	23.9
2006	25
2007	25.4
2008	25.9
2009	26.2
2010	26.5
2011	26.2
2012	26.2
2013	25.6
2014	24.6
2015	24.6
2016	25.1
2017	25
2018	25
2019	24.9