Year	%
1996	21.77
1999	18.08
2000	13.98
2001	13.82
2002	13.94
2003	14.39
2006	12.54
2007	12.14
2008	12.2
2009	13.55
2010	11.93
2011	11.57
2012	10.86
2013	10.86
2014	11.43
2015	11.43
2016	11.43
2017	11.38
2018	11.44
2019	12.32
2020	9.82