Year	metric tons
1961	167573842
1962	174058649
1963	181042237
1964	184941125
1965	172269255
1966	164890929
1967	190529667
1968	204744712
1969	211081541
1970	221288824
1971	218053080
1972	210972871
1973	227142858
1974	219579866
1975	245227096
1976	242451777
1977	255066921
1978	263359443
1979	247795958
1980	273067202
1981	283547331
1982	278207087
1983	307793552
1984	308384495
1985	324792487
1986	332699815
1987	316661509
1988	353942845
1989	381122011
1990	378703260.92
1991	384405688.95000005
1992	432275966.12
1993	454436585.25
1994	453148506.99
1995	455112596.2900001
1996	473619790.73
1997	477488438.14
1998	486593838.07
1999	503500942.26000005
2000	505448795.90000004
2001	530294204.70000005
2002	507189558.34000015
2003	544127548.74
2004	560392622.55
2005	577450232.29
2006	592431501.5500001
2007	607104511.67
2008	643265087.6500001
2009	631876869.34
2010	645941831.51
2011	684118154.6299999
2012	681192556.7699999
2013	713470126.8799999
2014	725865576.7600001
2015	714911564.4699998
2016	729614683.5499998
2017	750428273.2500001
2018	774307795.3199999
2019	783255969.02
2020	790228521.43
2021	840698255.4600002
2022	793583092.0799999