Year	% of fertilizer production
1973	250
1974	165
1975	84.05797101449275
1976	103.46753246753246
1977	77.46478873239437
1978	110.58904109589041
1979	145
1980	108.27067669172932
1981	49.36132626715587
1982	20.013155068728523
1983	4.543742244282929
1984	2.3570397338522375
1985	1.7713735028222661
1986	0.773383775689149
1987	1.16573338150289
1988	2.265059235775071
1989	1.7139035197725945
1990	1.3728282959523628
1991	1.7574845297615869
1992	1.3512862179134075
1993	1.375566893902441
1994	0.9929782254060571
1995	1.0425490323841793
1996	1.2864090713671539
1997	1.9113875602654824
1998	1.6681308761193372
1999	1.4748574722951764
2000	1.3664918933496246
2001	1.396150812210735
2002	1.9549516782708096
2003	2.062860499893185
2004	0.614499657907407
2005	1.1002187261180068
2006	0.6929599194597527
2007	0.7909515146721505
2008	0.9078071414161791
2009	1.9194726882577162
2010	1.362149848225976
2011	1.198501872659176
2012	1.5052330869448252
2013	1.9905671547539174
2014	1.2383892209160192
2015	2.249233000502036
2016	1.7620653179955044
2017	1.378338197235835
2018	1.1484468937875751
2019	1.2343941874744166
2020	0.8189618793079195
2021	1.2973226426595394