Year	metric tons
1960	6045
1961	7538
1962	7700
1963	7824
1964	8263
1965	10809
1966	10135
1967	10638
1968	12178
1969	11147
1970	9272
1971	11910
1972	13914
1973	13176
1974	12190
1975	15188
1976	14149
1977	13633
1978	16060
1979	17118
1980	18555
1981	21202
1982	21655
1983	25363
1984	23609
1985	24244
1986	24402
1987	25851
1988	28659
1989	33059
1990	41946
1991	42098
1992	43264
1993	39739
1994	42892
1995	44730
1996	41924
1997	39697
1998	42368
1999	42670
2000	43609
2001	41573
2002	32026
2003	37772
2004	42814
2005	39012
2006	37188
2007	31168
2008	36066
2009	35130.4
2010	36175
2011	35918
2012	34585.54
2013	37707.2
2014	34382.2
2015	35866.7
2016	36337
2017	37498
2018	36453
2019	40221.49
2020	42629
2021	40594.2
2022	37921.2