Year	%
1996	19.15
1999	17.63
2000	15.37
2001	13.22
2002	13.22
2003	11.07
2004	10.59
2005	10.71
2006	15.85
2007	16.83
2008	16.67
2009	16.29
2010	9.28
2011	9.28
2012	12.67
2013	19.16
2014	9.02
2015	12.52
2016	12.26
2017	18.29
2018	18.72
2019	17.92
2020	17.92
2021	17.92