Year	% of output
1971	9.098231751754824
1972	9.261833599777576
1973	9.19290850483511
1974	9.087931881447519
1975	9.739395092257942
1976	10.762189685574466
1977	10.491052497667713
1978	10.023664395840804
1979	10.277002263353209
1980	9.943808449692094
1981	12.069868995633188
1982	10.457103307152959
1983	10.373267119070654
1984	10.178249430961602
1985	12.611398795513205
1986	8.198881141559916
1987	9.521701445520378
1988	10.375414778025982
1989	9.885439301979003
1990	9.59522818920822
1991	9.946571647300726
1992	9.528918680340752
1993	9.662014073134156
1994	9.94434831408128
1995	9.953060609406378
1996	10.052599824950502
1997	10.245563903336972
1998	9.378422985611689
1999	9.461642876936878
2000	11.416442907856968
2001	11.074821729277977
2002	10.574650167462103
2003	9.427655099113295
2004	10.52466419598122
2005	12.194060031799374
2006	11.381671311050399
2007	12.359215728770252
2008	13.754795110478021
2009	13.985581744444936
2010	13.029799256880388
2011	12.75395898040234
2012	14.174832525936296
2013	13.733085822793532
2014	14.359833284942967