Year	% of output
1971	25.067385444743934
1972	25.059665871121716
1973	25
1974	24.979658258746948
1975	24.980842911877392
1976	24.957264957264957
1977	24.957264957264957
1978	24.957264957264957
1979	25.07936507936508
1980	25.037037037037035
1981	25.037037037037035
1982	25
1983	25.03192848020434
1984	25.07462686567164
1985	25.06203473945409
1986	25.06203473945409
1987	25.061728395061728
1988	25.030674846625768
1989	25.03052503052503
1990	25.089179548156952
1991	28.586723768736615
1992	28.511087645195353
1993	28.421052631578945
1994	28.37696335078534
1995	28.4375
1996	28.404669260700388
1997	10.034904013961606
1998	14.56752655538695
1999	14.531835205992511
2000	14.602076124567473
2001	14.529914529914532
2002	14.61756373937677
2003	12.93233082706767
2004	26.433691756272403
2005	23.761665470208186
2006	11.796733212341199
2007	13.397575380789556
2008	10.009624639076034
2009	10.010559662090813
2010	11.506698476784731
2011	11.272341178552468
2012	11.266924564796906
2013	11.270691333982473
2014	11.265822784810126