Year	%
1995	16.2
2000	15.2
2003	13.4
2004	13.5
2005	14.1
2006	14.5
2007	13.6
2008	13
2009	13.2
2010	14.5
2011	16.3
2012	17.5
2013	17.2
2014	16.7
2015	17.5
2016	16.2
2017	14.9
2018	13.8
2019	13.9
2020	15
2021	13.8