Year	%
1991	11.91
1995	7.25
1996	14.02
1997	13.08
1998	13.05
1999	6.59
2000	15.15
2001	15.24
2002	5.03
2003	15.44
2004	3
2005	3
2006	2.39
2007	2.41
2008	1.87
2009	1.61
2010	5.37
2011	5.37
2012	5.17
2013	4.87
2014	1.02
2015	4.45
2016	4.35
2017	1.24
2018	1.21