Year	% of fertilizer production
1961	90.87179839990182
1962	94.3256472090233
1963	93.10766845581267
1964	91.17867936782763
1965	89.37740575945205
1966	91.52322247902264
1967	92.28198269392946
1968	93.93770543834654
1969	93.91601540545453
1970	95.9035656351361
1971	95.6905386969333
1972	95.91376853260083
1973	97.40569441934713
1974	90.13715815047605
1975	99.3310191071281
1976	98.29791424892083
1977	97.93050287494654
1978	97.50198737759459
1979	95.93334069861848
1980	95.44724551738217
1981	100.31175172860384
1982	99.81679831373064
1983	97.03561761774789
1984	95.91036600497983
1985	97.72891398739881
1986	94.9141414168004
1987	93.18304927109688
1988	94.09851172272718
1989	96.10044255209066
1990	97.10874887184106
1991	97.36293492669931
1992	89.00053060653184
1993	88.53444726120358
1994	88.36105039608485
1995	88.38347684756917
1996	89.01460841646882
1997	92.40343263324421
1998	92.40097302597395
1999	93.56243587217054
2000	92.77908647911008
2001	92.73312937102237
2002	94.49211681600741
2003	95.00482924537091
2004	93.34684888210647
2005	92.85330546808858
2006	94.86542733554025
2007	93.03585373515408
2008	92.2758780919272
2009	99.34064412124891
2010	91.82423428582483
2011	94.0899336278932
2012	93.52304215750786
2013	93.972964563078
2014	92.34652520339539
2015	88.85296240350098
2016	90.54299709564313
2017	92.75434200308283
2018	92.69445220143335
2019	87.55874477347511
2020	92.60698611848996
2021	91.09580773850823