Year	%
1992	4.07
1996	15.41
1997	14.34
1998	14.38
1999	9.76
2000	11.02
2001	13.87
2002	13.3
2003	11.4
2004	10.67
2005	9.05
2006	9.81
2007	9.73
2008	0.3
2009	0.43
2010	0.54
2011	0.01
2014	0
2016	0.01
2017	0.01
2018	0.01
2019	0
2020	0
2021	0