Year	% of fertilizer production
1961	44.00119083060435
1962	44.03753645805935
1963	41.49982765743033
1964	41.636919938806734
1965	39.8309065288868
1966	39.20414410171886
1967	40.325129826145854
1968	39.34924078091107
1969	41.92586280357904
1970	41.829652996845425
1971	42.19886822958771
1972	37.48336818095419
1973	36.21291448516579
1974	44.908212560386474
1975	48.87186036611324
1976	48.193813540990696
1977	51.90476190476191
1978	43.908281998631075
1979	44.646734591615164
1980	45.459326788218796
1981	44.09448818897638
1982	41.02481469545601
1983	38.98691816245817
1984	38.5932150638033
1985	40.79497907949791
1986	43.908819133034385
1987	38.61952861952862
1988	33.63748840086607
1989	29.327255145738363
1990	28.091408658356787
1991	31.447201210287446
1992	29.139376770538245
1993	27.81081081081081
1994	27.380952380952383
1995	25.27075812274368
1996	24.302325581395348
1997	25.43424317617866
1998	30.271084337349397
1999	26.225165562913904
2000	22.28637413394919
2001	21.60232843137255
2002	24.45637512672334
2003	25.76363053159722
2004	24.431564293097992
2005	26.493744180769625
2006	22.62282685347225
2007	22.304454329894565
2008	21.88947728483252
2009	27.284556128977787
2010	16.944120426429023
2011	19.578575234847367
2012	18.19763486266048
2013	16.337458331346443
2014	17.15918606534127
2015	17.550371598329633
2016	18.770603913066886
2017	17.225999328448243
2018	18.025950034788398
2019	17.8341888924427
2020	16.921334947655293
2021	18.23832543920718