Year	% of fertilizer production
1973	290.98614843911514
1974	634.6482260974143
1975	52.54199955948019
1976	45.0025884075046
1977	58.67477254976463
1978	46.37649083978852
1979	29.409304084111625
1980	25.168246120038457
1981	24.79056626950006
1982	27.294426181958812
1983	26.612746793060698
1984	15.188973822341104
1985	14.809988484150555
1986	13.891619142009972
1987	20.766570728983204
1988	16.732181982214204
1989	18.673874118351137
1990	14.044269161228618
1991	13.237181119201589
1992	34.259501798457734
1993	27.659701350126426
1994	20.379008501321636
1995	17.473764712618294
1996	16.620074284538465
1997	11.03777445534365
1998	8.32583462330435
1999	8.200850669763723
2000	8.904386896556918
2001	7.009951659241897
2002	6.786365706649937
2003	8.042746618361576
2004	6.929861277744451
2005	5.064166620714107
2006	4.873173669322343
2007	5.096571393661069
2008	5.5126592765000595
2009	6.781337441350675
2010	7.613918876715944
2011	6.521996557774586
2012	5.612528859254089
2013	4.551716823378608
2014	4.770358601026544
2015	5.389070667621584
2016	4.305306908116894
2017	6.239309028917707
2018	7.405109831639291
2019	6.599925676299724
2020	6.05466939990345
2021	6.35265614337514