Year	%
2001	18.26
2002	18.35
2003	17.53
2005	16.3
2006	15.7
2007	14.64
2008	13.77
2010	14.06
2011	14.22
2012	14.94
2014	9.89
2016	15.13
2020	9.05
2021	8.13