Year	%
2000	27.1
2001	26.2
2002	25.3
2003	24.8
2004	24
2005	23.1
2006	22.2
2007	21.5
2008	20.6
2009	19.7
2010	18.8
2011	17.8
2012	17
2013	16.1
2014	15.3
2015	14.7
2016	14.1
2017	13.5
2018	13
2019	12.7