Year	%
1996	21.95
1999	18.58
2000	18.62
2001	12.36
2002	12.84
2003	12.8
2005	12.66
2006	9.68
2007	9.26
2010	13.29
2011	13.38
2012	11.06
2013	11.75
2014	8.75
2015	8.16
2016	8.7
2019	8.71
2020	8.93