Year	kilograms per hectare of arable land
1992	80.69060607877226
1993	40.34919301613968
1994	34.0632603406326
1995	26.737967914438503
1996	15.818494079363644
1997	16.9886037302379
1998	15.642765840891107
1999	12.764003673094582
2000	13.5118535806412
2001	14.568030242493162
2002	15.949391592920353
2003	15.778355911330049
2004	16.418016132011577
2005	17.19246887711081
2006	21.553658386241757
2007	27.638897453289758
2008	32.786844860503784
2009	27.30340538210481
2010	32.65818887212489
2011	38.87227299301517
2012	41.40875822621317
2013	45.57189492632028
2014	44.90814769606347
2015	43.17345537757437
2016	52.74743714913351
2017	61.88264730113203
2018	65.39079935540758
2019	65.07319888227433
2020	75.58884096707568
2021	78.48727372129753