Year	%
1996	6.23
1997	9.77
1998	6.23
1999	6.23
2000	13.01
2001	7.11
2002	9.04
2003	8.44
2004	8.87
2005	9.07
2006	8.4
2007	5.51
2008	6.54
2010	3.24
2011	4.71
2012	4.56
2013	4.71
2015	4.96
2016	3.99
2017	3.48
2018	3.48
2020	2.77
2021	2.51