Year	%
1996	12.12
1997	12.56
2000	9.94
2001	9.95
2002	11
2008	10.1
2009	10.18
2010	9
2011	8.93
2012	9.04
2013	8.84
2014	8.07
2015	7.52
2016	6.79
2017	6.42
2018	7.07
2019	9.53
2020	6.51
2021	6.85