Year	%
1996	8.91
2000	7.2
2001	6.9
2003	7.23
2004	7.25
2005	7.25
2006	7.28
2007	6.29
2008	6.33
2009	6.14
2010	6.32
2011	6.14
2012	6.35
2013	6.77
2014	6.86
2015	7.76
2016	7.71
2020	7.03
2021	8.06