Year	% of fertilizer production
1961	225.97859207750605
1962	283.86455460783685
1963	187.8569737153682
1964	134.97666378565253
1965	119.46667952550874
1966	55.79669350147311
1967	69.04549509366636
1968	62.720044510289775
1969	71.60766905788154
1970	78.18343722172752
1971	66.17840934635083
1972	69.02089480339616
1973	71.59303882195448
1974	93.03482587064677
1975	123.08834446919079
1976	151.50040551500405
1977	87.26300437530384
1978	69.50672645739911
1979	108.10734463276836
1980	96.89123300515705
1981	94.1860568383659
1982	62.9013079667063
1983	44.69558877141815
1984	66.02306248323947
1985	55.317188983855644
1986	58.58470565966307
1987	48.92774193548387
1988	28.17444084144009
1989	26.130366448837787
1990	22.9613593124713
1991	20.414368547588744
1992	22.530008518547202
1993	21.70301142263759
1994	25.450625269512724
1995	23.419087136929463
1996	23.24276669071091
1997	27.6038961038961
1998	26.432219655811835
1999	29.521622934888242
2000	25.837974683544303
2001	22.69691241335854
2002	37.042140801119096
2003	35.11287314740812
2004	28.993450285648336
2005	39.66223406291388
2006	33.381263286802294
2007	32.85961631691946
2008	38.692663417072865
2009	21.79201320132013
2010	18.895085692197373
2011	17.519075534331403
2012	15.083494982144629
2013	20.35547880601365
2014	19.15891039893761
2015	19.92004397226091
2016	8.982767043342415
2017	9.69347718348519
2018	9.054387443130118
2019	6.558935137450231
2020	6.082079575447065
2021	5.862394885040437