Year	%
1993	15.78
1995	15.24
1997	13.78
1998	13.76
1999	13.53
2000	13.93
2001	11.97
2002	11.77
2003	11.26
2004	9.69
2005	9.77
2006	2.52
2007	2.73
2008	1.34
2009	1.1
2010	1.38
2011	0.67
2013	0.44
2014	0.43
2015	0.62
2017	0.1
2018	0.08
2019	0.08
2020	0.07
2021	0.08