Year	%
1996	13.32
1997	18.97
1998	13.32
1999	13.32
2000	22.99
2001	13.41
2002	13.03
2003	13.15
2004	13.07
2005	12.89
2006	12.39
2007	10.26
2008	11.71
2010	10.68
2011	12.73
2012	12.77
2013	12.65
2015	11.14
2016	10.12
2017	9.24
2018	9.24
2020	8.85
2021	7.8