Year	%
1996	11.93
1997	12.81
1999	12.13
2000	11.85
2001	11.23
2002	10.26
2003	11.35
2004	11.38
2005	11
2006	12.07
2007	11.64
2008	11.64
2009	11.01
2010	11.03
2011	11.85
2012	9.7
2013	9.66
2014	9.66
2015	10.27
2016	10.5
2017	12.4
2018	12.49
2019	11.29
2020	11.29
2021	11.62