Year	% of fertilizer production
1961	119.23153503365886
1962	128.339112282626
1963	142.99110922018167
1964	141.51880534588113
1965	136.3940138015964
1966	72.81263008070039
1967	127.04332311633652
1968	109.40280269193264
1969	124.3197640117994
1970	127.00654001868577
1971	124.04214586393665
1972	112.39700384699964
1973	110.9759822519452
1974	91.26891232233879
1975	90.39948006932408
1976	108.00261627906977
1977	95.9171974522293
1978	98.32631578947368
1979	105.25078369905955
1980	100.5679012345679
1981	118.34682254196642
1982	103.77364544592722
1983	126.1920420914173
1984	110.84919057086056
1985	130.67003027245207
1986	128.665568369028
1987	95.95375722543352
1988	110.90781140042223
1989	94.22680412371133
1990	101.26878130217027
1991	84.41520467836257
1992	101.52091254752851
1993	88.21548821548821
1994	88.96797153024912
1995	89.09774436090225
1996	76.06923076923077
1997	90.5020618556701
1998	77.95506329113924
1999	79.42354948805462
2000	95.11940928270042
2001	75.19434872501724