Year	%
1996	22.03
1999	18.11
2000	15.83
2001	12.66
2002	12.66
2003	13.13
2004	13.14
2005	13.14
2006	10.95
2007	11.16
2008	11.07
2009	12.93
2010	12.97
2011	12.97
2012	11.56
2013	11.61
2014	11.46
2015	11.57
2016	11.52
2017	11.36
2018	11.33
2019	11.51
2020	11.51
2021	11.51