Year	% of fertilizer production
1961	151.530929437364
1962	151.67760549911318
1963	150.46724494984855
1964	136.2814753060689
1965	115.83907131111228
1966	89.41507045921117
1967	85.96456770981857
1968	96.60374925996985
1969	108.02347267221107
1970	115.81217923170146
1971	116.75066461869855
1972	104.55328701669596
1973	114.6579768104696
1974	98.50773138955674
1975	106.11984964092136
1976	118.18966020599385
1977	71.5040136017226
1978	68.72012044863735
1979	63.582418731551506
1980	62.08456370853234
1981	66.09196258549326
1982	60.418388576965825
1983	51.282513884305544
1984	46.90045319622778
1985	46.0023691301833
1986	47.41169629649861
1987	46.107348068793556
1988	39.42728322229242
1989	36.73168675372193
1990	40.725094074387826
1991	40.37326767968986
1992	39.07146543003088
1993	39.541971796690035
1994	34.149787961409146
1995	33.36939981620165
1996	34.08570120278953
1997	35.93269041792296
1998	33.063839689710406
1999	33.342262683582135
2000	32.45208036737301
2001	31.542920787054154
2002	33.78380991259736
2003	30.251978498350994
2004	32.282908547790385
2005	30.223201557922728
2006	28.375962952320478
2007	24.41201368020402
2008	23.0074541654352
2009	22.024289033562777
2010	17.748322456040842
2011	21.201351470307657
2012	18.605062028814373
2013	17.24798684406078
2014	16.93547513862193
2015	17.441024194818255
2016	15.236344272830317
2017	14.906612652824146
2018	14.583991450611538
2019	14.010169621766645
2020	13.024561104352633
2021	13.03691172032373