Year	%
1992	7.66
1993	9.72
1996	1.58
1997	1.5
1998	1.33
1999	1.17
2000	0.77
2001	4.52
2002	4.18
2003	4.62
2004	4.37
2005	6.44
2006	7.88
2007	0.47
2008	0.4
2009	0.48
2010	13.44
2011	0.98
2012	1.09
2013	0.44
2014	0.48
2015	0.56
2016	0.51
2017	0.57
2019	0.54
2020	0.67
2021	0.63