Year	% of fertilizer production
1970	20.434782608695652
1971	7.2283582952639795
1972	3.6434782608695655
1973	13.907742998352553
1974	9.931761786600497
1975	9.316770186335404
1976	8.451993248864905
1977	8.629310344827585
1978	11.926764754504877
1979	15.933818181818182
1980	26.950000000000003
1981	42.482041587901705
1982	59.13111668757842
1983	80.79346601577168
1984	65.89152757683757
1985	81.52028157581827
1986	94.46268279804403
1987	100.56863469784881
1988	108.50559294833408
1989	113.67880485527544
1990	86.16740088105726
1991	63.65914786967418
1992	60.10489900680728
1993	47.25308962509087
1994	30.040053404539385
1995	24.699947817011655
1996	26.5627618568795
1997	29.157961667726408
1998	27.122544587819515
1999	28.25652363328407
2000	26.864965636216926
2001	25.642122143525327
2002	23.568784740582156
2003	24.196611714654715
2004	26.000260654242147
2005	21.047285859383816
2006	20.969525435576003
2007	17.150279600193738
2008	11.73272933182333
2009	10.787992495309568
2010	10.768525646445275
2011	11.657072368421053
2012	10.191292875989445
2013	8.243667297305295
2014	9.477704338598507
2015	8.78120974593691
2016	8.051722818740595
2017	7.3004637539663175
2018	7.094140136407619
2019	7.094140136407619
2020	5.643185866983373
2021	5.643185866983373