Year	% of fertilizer production
1961	476.07165067519543
1962	472.30608886450904
1963	495.23027775312806
1964	371.4550343124228
1965	398.45180246355517
1966	377.92768366483745
1967	362.87891850881124
1968	349.8185244201634
1969	350.4955224602584
1970	355.216598023309
1971	370.03369958226557
1972	388.80800257406173
1973	440.6504211036687
1974	315.41267269081817
1975	382.18239230672623
1976	332.5451186150014
1977	320.9213604128764
1978	303.20346167743304
1979	283.3174300900191
1980	222.7393135381971
1981	258.97052102855656
1982	223.74603609935036
1983	198.87231074613098
1984	184.74442819275623
1985	197.7135920663798
1986	229.90225213935335
1987	169.97755331088663
1988	180.77937298564314
1989	193.28579916815212
1990	238.0451127819549
1991	236.01626016260164
1992	239.1509433962264
1993	210
1994	198.29787234042553
1995	196.41255605381164
1996	229.08163265306123
1997	215.27093596059115
1998	209.13705583756345
1999	168.91891891891893
2000	225.16129032258064
2001	199.14064516129034
2002	223.6252048945984
2003	191.55629240359968
2004	327.57585728957895