Year	% of fertilizer production
1961	176.14184265166892
1962	184.80297343673263
1963	179.58998264104824
1964	193.17933953925913
1965	177.94972054189572
1966	161.160335895411
1967	158.1712507099182
1968	155.46561326253078
1969	164.85371395118688
1970	167.396712794125
1971	153.45902578126825
1972	147.81623608874702
1973	160.50103145222823
1974	142.472773485994
1975	167.05214452555674
1976	181.58920549965183
1977	164.61296996059025
1978	176.48897957807046
1979	169.12421343275122
1980	154.88518901476712
1981	167.27550306543384
1982	150.66066141573896
1983	144.25196236808898
1984	134.03681767060255
1985	135.728179220216
1986	154.0650607261303
1987	141.49469256394332
1988	146.93864405824405
1989	146.37721832439127
1990	115.54881268348316
1991	143.18235294117648
1992	268.54786324786323
1993	265.5241935483871
1994	262.6008130081301
1995	208.55815602836878
1996	252.48536585365855
1997	262.7093220338983
1998	262.5214285714286
1999	268.5444444444444
2000	222.4267716535433
2001	301.58002270147557
2002	307.71001150747986
2003	322.88289176827385
2004	312.28221949871437
2005	306.64042266652854
2006	255.69196428571428
2007	264.44596274683306