Year	%
1995	9.59
1996	7.21
1997	9.23
1998	8.04
1999	7.96
2000	8.1
2001	7.84
2002	6.69
2003	6.67
2004	5.54
2005	6.69
2006	6.56
2007	5.4
2008	4.73
2009	6.55
2010	6.53
2011	6.51
2012	6.38
2013	6.36
2015	4.32
2018	4.01
2020	3.9
2021	3.36