Year	%
1999	8.26
2001	8.35
2002	8.91
2003	7.44
2004	6.96
2005	5.67
2006	6
2007	0.78
2008	0.59
2009	0.46
2010	0.54
2011	1.48
2012	1.37
2013	1.2
2015	1.02
2016	1.16
2020	1.03
2021	2.82