Year	% of output
1990	8.487337440109515
1991	9.395973154362416
1992	8.306151862246832
1993	9.313919442905753
1994	9.317835365853659
1995	12.306122448979592
1996	11.198019801980198
1997	9.844177721625606
1998	13.349617672047579
1999	13.047404063205418
2000	14.250888776028441
2001	14.07163053722903
2002	14.028037383177569
2003	13.61111111111111
2004	13.666107382550335
2005	13.845553822152887
2006	13.362637362637365
2007	13.111559139784944
2008	13.803191489361701
2009	13.103879849812266
2010	12.797118847539016
2011	12.717770034843207
2012	12.591549295774648
2013	12.639109697933225
2014	12.485294117647058