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	11.93
2007	13.08
2008	12.57
2009	16.29
2010	9.28
2011	9.28
2012	10.48
2013	14.81
2014	7.08
2015	9.53
2016	9.48
2017	13.38
2018	13.58
2019	13.9
2020	13.9
2021	13.9