Year	%
1995	16.5
2000	17
2003	17.2
2004	16.9
2005	16.7
2006	16.7
2007	17
2008	16.9
2009	17.1
2010	17.1
2011	17.3
2012	17.2
2013	16.9
2014	17
2015	17
2016	17.1
2017	17.1
2018	17.2
2019	17.2
2020	17.2
2021	17.2