Year	%
1996	22.82
1999	19.58
2000	16.35
2001	13.55
2002	13.55
2003	13.97
2004	13.93
2005	13.93
2006	11.43
2007	11.61
2008	11.93
2009	13.92
2010	14.47
2011	14.47
2012	12.71
2013	12.51
2014	12.32
2015	12.38
2016	12.3
2017	11.64
2018	12.23
2019	12.39
2020	12.39
2021	12.39