Year	%
1999	10.12
2001	9.67
2002	10.7
2003	9.44
2004	9.43
2005	8.21
2006	4.32
2007	0.55
2008	0.57
2009	0.5
2010	0.48
2011	0.81
2012	0.7
2013	0.66
2015	0.3
2016	0.67
2020	0.21
2021	0.34