Year	%
1994	12.39
1999	12.36
2000	12.56
2001	12.55
2002	6.63
2003	6.71
2004	6.67
2005	4.28
2006	4.28
2007	4.1
2008	3.62
2009	3.55
2011	4.85
2012	4.2
2013	4.2
2014	4.11
2015	5.17
2017	4.18
2020	4.68