Year	%
1985	14.4
1988	14.3
1992	14.6
1995	13.9
1997	14.3
2000	12.9
2003	13.9
2004	13.4
2005	13.6
2006	13.9
2007	13.6
2008	13.9
2009	13.9
2010	13.9
2011	14
2012	14.2
2013	14.1
2014	13.9
2015	14
2016	14.1
2017	14.2
2018	14.3
2019	14.2
2020	14.5
2021	14.4