Year	%
1996	23.06
1999	21.75
2000	18.14
2001	21.82
2002	18.25
2003	18.04
2006	14.14
2007	13.59
2008	13.83
2010	9.56
2011	14.15
2012	13.02
2013	14.33
2015	17.68
2016	15.08
2019	16.46