Year	metric tons
1961	22945358
1962	23568117
1963	24189927
1964	22746329
1965	22996908
1966	23645383
1967	32170667
1968	25521609
1969	27910622
1970	28161845
1971	32792275
1972	34466343
1973	27365422
1974	36203464
1975	34726798
1976	36382308
1977	37586018
1978	37447796
1979	34329215
1980	38397322
1981	45003485
1982	36230066
1983	31916865
1984	30257205
1985	39232395
1986	40580615
1987	37583567
1988	44710433
1989	45376965
1990	39427561.05
1991	41154125.58
1992	31279380.93
1993	42582912.43
1994	46513986.95
1995	37898224.77
1996	50959050.54
1997	46959631.61000001
1998	44839949.85
1999	44298132.91
2000	47722836.95
2001	48737924.82
2002	48714657.9
2003	50873040.57000001
2004	52242931.03
2005	57791631.339999996
2006	56623599.53000001
2007	58276861.01
2008	62630713.53000001
2009	66822952.3
2010	74763863.19000001
2011	75457874.17
2012	76685477.79999998
2013	80645909.01
2014	91080650.59
2015	81164143.63
2016	84133769.93
2017	95089877.89999999
2018	95482312.14000002
2019	89780693.57000001
2020	103468520.75000001
2021	107487699.33
2022	102466864.10000001