Year	% of fertilizer production
1961	69.69471805804035
1962	74.04901856706734
1963	71.90838693661912
1964	69.91483427389454
1965	69.23116912461542
1966	67.78316283584171
1967	70.03310501749554
1968	68.6596708752085
1969	72.93385040173384
1970	75.02313583363099
1971	76.73010129413301
1972	77.00203499107255
1973	77.2312067249703
1974	69.13259535499829
1975	79.79249900635732
1976	78.64129420882962
1977	76.28987517809865
1978	78.07937818034175
1979	78.03112329212647
1980	76.06407626949606
1981	79.26398606020273
1982	80.66295622119826
1983	78.32410066602449
1984	77.6207601033487
1985	81.52120108679871
1986	85.2352763588364
1987	83.13706180354203
1988	84.20220232066893
1989	86.4988154372337
1990	88.37444535131037
1991	90.33436177972156
1992	89.93283596230702
1993	95.4097631609508
1994	98.56260788114234
1995	96.31175283033805
1996	98.87603560278716
1997	95.42509428600951
1998	98.32867146648448
1999	101.44921003449386
2000	108.52201854022697
2001	106.73844415209122
2002	99.86067655305412
2003	102.28543856675871
2004	97.81368466918047
2005	86.91725647670908
2006	84.6213870446113
2007	91.05419905341955
2008	76.57480503241814
2009	81.72979016072351
2010	84.63355414158836
2011	83.61082115187992
2012	86.25323155131315
2013	84.71670091329976
2014	89.28219956903263
2015	83.41084104013355
2016	84.06423443999944
2017	88.5945731589448
2018	89.3399262584341
2019	88.99676146153703
2020	97.16981719808462
2021	90.95977216761719