Year	kilograms per hectare of arable land
1961	1166.6666666666667
1962	750
1963	594
1964	557
1965	625
1966	625
1967	625
1968	1000
1969	1000
1970	750
1971	1500
1972	1000
1973	1000
1974	1500
1975	1500
1976	1500
1977	1500
1978	1500
1979	2150
1980	2200
1981	2350
1982	2350
1983	2350
1984	2500
1985	2600
1986	2600
1987	2750
1988	2800
1989	5600
1990	5600
1991	5100
1992	5600
1993	5500
1994	4701
1995	4537
1996	3142
1997	2063
1998	4027
1999	3769
2000	3005
2001	2353
2002	101.88000000000001
2003	128.33333333333334
2004	117.15714285714286
2005	116.56060606060606
2006	114.75384615384615
2007	128.42857142857142
2008	117.68333333333334
2009	117.7
2010	126.71875
2011	130.84126984126985
2012	138.1746031746032
2013	151.94736842105263
2014	151.58928571428572
2015	143.16071428571428
2016	141.98214285714286
2017	157.14285714285714
2018	152.03571428571428
2019	138.21428571428572
2020	140.89285714285714
2021	140.89285714285714