Year	metric tons
1961	202252268
1962	219700817
1963	242848521
1964	261365453
1965	268723956
1966	293764438
1967	304344677
1968	297769508
1969	303306451
1970	336588230
1971	358000220
1972	347090603
1973	365316335
1974	387823762
1975	405230155
1976	420380205
1977	410676617
1978	449029297
1979	465545954
1980	463875573
1981	496011634
1982	521365017
1983	543684977
1984	577160505
1985	556528997
1986	569983322
1987	579014671
1988	578723868
1989	590387838
1990	621976685.64
1991	622821072.6099999
1992	783755386.8899999
1993	776877312.6
1994	744116043.27
1995	746968972.5300001
1996	789944280.9599999
1997	820069455.4299998
1998	785293112.2900001
1999	790522382.1700002
2000	766754601.43
2001	794072498.7199999
2002	795089430.45
2003	767280798.8299999
2004	823583888.89
2005	843137389.3299999
2006	865778681.0500001
2007	895919905.9200001
2008	976578504.1999998
2009	948314988.3400002
2010	945421988.67
2011	1026676049.16
2012	1025068754.3599999
2013	1090103558.88
2014	1106597695.3
2015	1167128999.6900003
2016	1167039254.96
2017	1241496409.7900002
2018	1195695534.03
2019	1221432644.4000003
2020	1255609044.5200005
2021	1239230599.55
2022	1313716111.3999999