Year	%
1993	7.82
1999	14.54
2000	9.52
2001	7.24
2002	7.06
2003	6.99
2004	6.82
2005	6.69
2006	6.82
2007	6.56
2008	6.64
2009	6.63
2011	5.6
2012	5.29
2013	4.69
2014	4.69
2015	4.72
2016	4.57
2017	4.58
2021	3.64