Year	% of fertilizer production
1961	100.91955534130915
1962	94.86642567448422
1963	95.64855824611764
1964	97.43120254187086
1965	85.44183842691305
1966	74.1084933831204
1967	90.90576097352516
1968	81.29119387649801
1969	99.97137103143262
1970	85.76268934360883
1971	73.49729935085314
1972	96.13537300922044
1973	93.23897637795275
1974	76.59646592138478
1975	85.73931324456903
1976	89.71340376851093
1977	88.29950035315352
1978	84.85922972037795
1979	85.67741734636698
1980	94.63487005583653
1981	99.97126374066072
1982	111.18822971866787
1983	119.67828046824631
1984	105.35019455252919
1985	98.65306122448979
1986	114.24936386768448
1987	111.32828081372156
1988	134.04642694583524
1989	118.82046834345186
1990	125.6317689530686
1991	184.28571428571428
1992	172.85714285714286
1993	155.27950310559007
1994	160
1995	135.55555555555557
1996	134.375
1997	118.5929648241206
1998	128.57142857142858
1999	133.14606741573033
2000	122.3463687150838
2001	113.599126160568
2002	80.714297771679
2003	80.40949008365095
2004	79.61157239306759
2005	81.14421703386206
2006	88.15983579107827
2007	124.89621749881792
2008	97.09890604120307
2009	154.0536075612685
2010	106.06807371395742
2011	82.99404016930889
2012	100.1726403431749
2013	143.2333678000651
2014	129.96759394120446
2015	122.24191630734222
2016	115.93705871884158
2017	110.62699709223995
2018	148.28651379485962
2019	155.0795881061667
2020	148.97484679482218
2021	143.69797997641396