Year	%
1996	17.85
1999	16.67
2000	9.85
2001	9.53
2002	9.83
2003	10.08
2004	9.43
2006	8.91
2007	8.92
2010	7.45
2011	7.34
2012	10.38
2013	9.59
2015	10.52
2016	10.84
2020	8.41
2021	8.61