Year	%
1996	18.84
1999	16.57
2001	11.18
2002	10.95
2003	10.79
2006	11.46
2007	10.97
2008	10.56
2009	13.06
2010	13.06
2011	10.21
2012	9.65
2013	11.51
2014	11.51
2015	11.48
2016	11.47
2017	11.47
2018	11.49
2019	11.52
2020	10.4
2021	10.37