Year	%
1995	9.68
1997	8.35
1998	7.69
1999	7.12
2000	6.87
2001	7.16
2002	6.91
2003	6.41
2004	5.2
2005	6.69
2006	6.55
2007	5.36
2008	4.45
2009	5.01
2010	4.09
2011	3.99
2012	3.86
2013	3.83
2014	3.51
2015	3.33
2020	2.6
2021	3