Year	% of fertilizer production
1961	111.77966639915473
1962	107.05436042971583
1963	107.42841365346341
1964	84.9035922807193
1965	70.35578323644447
1966	62.098542831051084
1967	61.830887371465124
1968	69.50515540412492
1969	70.07337448161357
1970	68.33732653303285
1971	74.08918264742145
1972	67.17172120715416
1973	81.71341135261126
1974	70.65142729222863
1975	71.71112805469845
1976	78.74386805206845
1977	62.22746616331107
1978	59.822347760799104
1979	60.00451261386802
1980	63.891249891466074
1981	69.0419041254891
1982	68.33712547589133
1983	62.21041326322578
1984	53.57235028432369
1985	51.65129327680673
1986	51.5011854589359
1987	50.2542831167505
1988	45.52573614432721
1989	44.27018873740653
1990	45.897816239826966
1991	44.97035624170141
1992	45.553764221109276
1993	40.97558309253252
1994	38.21481504186431
1995	37.15435956888175
1996	36.905671428227215
1997	39.53018098287637
1998	36.45871931893646
1999	37.17170831693116
2000	36.51028121382447
2001	34.989658698431384
2002	36.013007715774556
2003	34.12757025847192
2004	35.41376839383846
2005	34.83671860195471
2006	36.30009612254435
2007	29.330325356606433
2008	27.830983430854978
2009	27.903395128998486
2010	21.471162932073465
2011	20.20970265292837
2012	18.807231449013674
2013	18.022876412402585
2014	18.75763210922315
2015	17.711765044322252
2016	15.225748593463011
2017	15.037871375455154
2018	15.22532479221601
2019	15.128820560209586
2020	14.477770364782039
2021	14.489252887637125