Year	%
1996	20.72
1999	19.37
2001	12.75
2002	12.99
2003	12.85
2006	11.78
2007	11.6
2008	11.73
2009	12.54
2010	12.57
2011	11.64
2012	11.23
2013	11.49
2014	11.49
2015	11.4
2016	10.97
2017	11.09
2018	10.87
2019	10.88
2020	11.76
2021	11.87