Year	kilograms per hectare of arable land
1972	9
1973	14
1974	20
1975	11.5
1978	21.5
1979	13
1981	150
1982	84
1983	213.5
1984	255
1985	240
1986	710
1987	155
1988	175
1989	252
1990	301
1991	350
1992	350
1993	300
1994	300
1995	300
1996	300
1997	300
1998	564
1999	216.5
2000	172.13930348258705
2001	149.2537313432836
2002	987.4405940594058
2003	987.4405940594058
2004	982.5763546798029
2005	982.5763546798029
2006	977.7598039215685
2007	661.9411764705883
2008	1219.1609756097562
2009	671.4780487804878
2010	1336.0825242718447
2011	968.266990291262
2012	1566.8309178743962
2013	1327.2850241545893
2014	1383.2067307692307
2015	1039.5048076923076
2016	311.9234449760766
2017	348.6363636363636
2018	534.5142857142857
2019	827.6142857142858
2020	1395.8904761904762
2021	1395.8904761904762