Year	%
1996	20.15
1999	17.56
2001	11.65
2002	11.93
2003	11.86
2006	11.17
2007	11.04
2008	11.16
2009	11.63
2010	11.63
2011	11.02
2012	10.57
2013	10.8
2014	10.8
2015	10.7
2016	10.2
2017	10.36
2018	10.13
2019	10.17
2020	9.99
2021	10.04