Year	%
1999	11.98
2001	11.43
2002	13.05
2003	12.82
2004	13.14
2005	12.2
2006	3.46
2007	1.38
2008	1.37
2009	1.23
2010	1.16
2011	1.71
2012	1.21
2013	1
2015	0.56
2016	1.12
2020	0.48
2021	0.54