Year	% of fertilizer production
1961	75.28897165455457
1962	82.53240247125355
1963	80.82602634266227
1964	78.93366206087765
1965	78.81666357041506
1966	78.54270846487245
1967	81.75549411839482
1968	81.15136378299083
1969	84.3594414607613
1970	85.58497625760307
1971	87.57080892932005
1972	87.87083159399269
1973	89.47754106440489
1974	81.51134894865217
1975	92.56094899583098
1976	89.13489792565387
1977	87.0630587042107
1978	87.62766120311244
1979	87.77856960102227
1980	85.18868888071222
1981	89.42244098373043
1982	89.43947530124039
1983	87.69112232244112
1984	85.59198607532558
1985	88.31977944546072
1986	91.55229958508124
1987	87.8818171575275
1988	89.5489915913003
1989	90.09452766714854
1990	89.5449619985384
1991	88.11151498211382
1992	85.92810712524201
1993	91.81525753093752
1994	92.71070746572474
1995	87.31347845453803
1996	90.99773441994878
1997	91.83908529452651
1998	96.25494370429878
1999	97.44017213531417
2000	99.82549301298315
2001	99.9096048257292
2002	96.76903454028381
2003	97.79088335291696
2004	91.21708404133203
2005	83.83462819498818
2006	84.0625705976483
2007	89.41273368463797
2008	80.7748638101219
2009	84.70453008927417
2010	87.18497718729527
2011	85.77173979436837
2012	86.78283388504374
2013	88.39098324694595
2014	89.82980581187458
2015	87.3898784412142
2016	90.17372751823471
2017	91.09338613851116
2018	92.03824728052761
2019	90.21035925477479
2020	92.51903007757258
2021	93.20115364011609