Year	%
1996	15.63
1999	11.19
2001	10.72
2002	11.65
2003	11.35
2006	10.02
2007	9.67
2008	9.25
2009	12.06
2010	12.05
2011	8.9
2012	8.88
2013	11.01
2014	11.01
2015	11.15
2016	11.49
2017	11.24
2018	12.1
2019	12
2020	20.74
2021	19.66