Year	% of output
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	12.76595744680851
1999	12.75465013286094
2000	18.333333333333332
2001	17.71479185119575
2002	18.760907504363004
2003	27.351247600767753
2004	28.336755646817245
2005	29.942965779467677
2006	29.50152594099695
2007	41.42512077294686
2008	46.91535150645624
2009	61.35265700483091
2010	62.59398496240601
2013	36.83640303358614
2014	11.024643320363165