Year	%
1996	10.23
1997	15.73
1998	10.23
1999	10.23
2000	20.21
2001	10.31
2002	10.77
2003	10.84
2004	10.8
2005	10.33
2006	9.61
2007	7.68
2008	9.01
2010	7.9
2011	9.09
2012	9.28
2013	9.15
2015	7.93
2016	7.49
2017	6.32
2018	6.33
2020	6.06
2021	5.53