Year	%
1993	5
2001	11.49
2002	11.52
2003	11.32
2004	11.37
2005	11.05
2006	9.09
2007	9.19
2008	9.19
2009	9.19
2010	9.27
2011	9.19
2012	8.82
2013	8.82
2014	8.61
2015	7.15
2016	7.59
2017	8
2018	6.93
2019	6.04
2020	7.62
2021	7.96