Year	%
1996	22.64
1999	20.3
2000	15.39
2001	12.8
2002	12.8
2003	12.36
2004	12.11
2005	12.18
2006	11.73
2007	13.57
2008	12.83
2009	14.8
2010	11.56
2011	11.56
2012	12
2013	14.51
2014	9.95
2015	12.03
2016	11.88
2017	12.72
2018	14.89
2019	13.07
2020	13.07
2021	13.07