Year	metric tons
1960	31545
1961	41436
1962	41893
1963	39525
1964	40474
1965	42112
1966	51800
1967	54769
1968	63673
1969	72390
1970	80876
1971	89384
1972	52748
1973	42574
1974	47884
1975	80821
1976	125100
1977	150858
1978	130775
1979	118363
1980	95966
1981	129097
1982	86643
1983	99978
1984	111932
1985	135840
1986	134063
1987	151656
1988	218191
1989	260191
1990	291719
1991	353333
1992	370974
1993	457314
1994	509800
1995	559504
1996	556155
1997	539817
1998	594579
1999	693762
2000	738155
2001	814121
2002	954608
2003	1064406
2004	1259984
2005	1304232
2006	1354297
2007	1370456
2008	1330861
2009	1416668
2010	1286122
2011	1202005.43
2012	1272700
2013	998117
2014	898564.86
2015	921023
2016	963573
2017	894974
2018	921313.13
2019	963266.54
2020	1011538
2021	990854
2022	1001181