Year	% of fertilizer production
1974	61.9272745561535
1975	41.211718170923476
1976	36.53379812064262
1977	44.78785502700819
1978	38.0730212437144
1979	27.646063671628017
1980	24.490602051143064
1981	25.04532260941478
1982	26.304881495314675
1983	27.083355359842678
1984	14.231072880457196
1985	11.70401827959471
1986	9.45159777856392
1987	14.257056010952109
1988	10.96127146296741
1989	12.63454594330324
1990	9.830089251568236
1991	9.487669329628343
1992	25.51698267068412
1993	18.624187600133006
1994	14.623101205633292
1995	12.318613920886648
1996	12.018037911310397
1997	9.078441254282012
1998	7.386718276068553
1999	7.117425796227032
2000	7.918355551035912
2001	5.907242696609156
2002	5.742105474306817
2003	7.327019690326305
2004	6.374532701942404
2005	4.665438955110205
2006	4.553334030723187
2007	4.734106927681165
2008	5.087412614478057
2009	6.079690008022678
2010	5.618454585399327
2011	4.919620360843758
2012	4.653256304029031
2013	5.931442172561805
2014	6.109301381723742
2015	6.919983048750663
2016	5.71804252136671
2017	7.549983664914213
2018	9.058694504773817
2019	8.202935141501163
2020	7.561973571633914
2021	7.671362592901882