Year	% of fertilizer production
1961	567.5
1962	655
1963	695.5555555555555
1964	815.7
1965	491.8857142857143
1966	149.2645402169365
1967	137.25791371710966
1968	155.964562873429
1969	296.1671783698128
1970	256.6992737512969
1971	203.2258064516129
1972	215.60330578512398
1973	147.89123728131528
1974	108.81410256410255
1975	137.2957942301008
1976	425.2873563218391
1977	264.4351464435146
1978	284.43921337845126
1979	222.45927075252135
1980	268.7707641196013
1981	314.8514851485149
1982	355.88235294117646
1983	670
1984	530
1985	430
1986	260.45005114217525
1987	208.9655172413793
1988	445.1548387096774
1989	821.4302325581394
1990	599.0333333333333
1991	463.6647058823529
1992	477.6470588235294
1993	535.2941176470588
1994	630
1995	1320
1996	1650.5376344086021
1997	1389.247311827957
1998	1397.8494623655913
1999	1110.3894736842105
2000	694.1466666666666
2001	968.0500000000001
2002	702.3166666666666
2003	856.5630590339892
2004	1128.744686171543
2005	747.3700294128882
2006	927.156192773237
2007	1611.2597809076683
2008	2206.712962962963
2009	2290.7444444444445
2010	1496.858585858586
2011	2813.590909090909
2012	1539.2150000000004
2013	2530.9314347826084
2014	2740.486158536585
2015	1813.5223225806453
2016	1671.7157352941176
2017	2258.382039473684
2018	2178.039405405406
2019	1885.2351351351351