Year	% of fertilizer production
1961	23.18181818181818
1962	29.70348219775306
1963	23.221893524916908
1964	20.68532619880634
1965	15.480303588117017
1966	16.729373731815524
1967	12.56924431417369
1968	15.676190995015391
1969	20.989166530567804
1970	18.03326370342949
1971	18.940828850670506
1972	18.409425625920473
1973	20.182402830106692
1974	24.90844487613422
1975	35.356180935730144
1976	30.42715693800817
1977	17.420771286750668
1978	21.52264946934192
1979	19.563090968373004
1980	13.66432337434095
1981	15.463594470046083
1982	15.605543783817044
1983	12.750762291443218
1984	14.386820953482069
1985	14.021716205700322
1986	12.209191097609757
1987	11.637506146961899
1988	10.72711407804002
1989	10.758779246864702
1990	9.693348214182558
1991	11.659985852393303
1992	11.586221349628289
1993	11.347686451766386
1994	9.997753313862054
1995	8.057301013441043
1996	9.58630640602455
1997	11.175176565937246
1998	11.296061117174323
1999	10.008920606601249
2000	9.776021080368906
2001	8.6333419666753
2002	7.976958352464672
2003	8.191842361730838
2004	9.314247192159183
2005	10.608945341320162
2006	10.763441261420502
2007	11.691210017985549
2008	9.473547132148669
2009	11.621176679445881
2010	10.127666688762478
2011	26.285181826310506
2012	19.754887797070957
2013	13.53883714657676
2014	17.103749568054482
2015	30.60871380973677
2016	26.907123670305072
2017	21.025666416437524
2018	34.46195332413067
2019	34.39129560244168
2020	72.40427112847236
2021	88.16870206289316