Year	metric tons
1960	245611
1961	251722
1962	244516
1963	292337
1964	335341
1965	381021
1966	425630
1967	459789
1968	539022
1969	566117
1970	652471
1971	716370
1972	768424
1973	812116
1974	957319
1975	1126574
1976	1077259
1977	986948
1978	850318
1979	897313
1980	972945
1981	961093
1982	1002704
1983	1148640
1984	1107562
1985	1053084
1986	1061725
1987	1084902
1988	1077907
1989	928684
1990	693363
1991	663863
1992	1180162.08
1993	958208.27
1994	901936.01
1995	943987.05
1996	822440
1997	755817.49
1998	678129.0800000001
1999	691542.19
2000	691529.24
2001	757069.12
2002	740591.54
2003	684415.04
2004	722991.12
2005	707900.09
2006	701723.3
2007	773618.08
2008	776304.79
2009	854677.73
2010	782992.39
2011	771320.8899999999
2012	620043.39
2013	707284.08
2014	758228.7400000001
2015	674308.38
2016	751686.06
2017	707320.53
2018	699929.9999999999
2019	711868.2700000001
2020	679416.39
2021	667846.9699999999
2022	649552.8999999999