Year	metric tons
1961	354320457
1962	381363474
1963	400748662
1964	388132419
1965	417307509
1966	431022783
1967	459208074
1968	471638285
1969	472997638
1970	434838177
1971	525020984
1972	508774756
1973	527314442
1974	499872607
1975	546111785
1976	556755509
1977	573380743
1978	617099334
1979	620998843
1980	600972994
1981	675719579
1982	684161930
1983	563148152
1984	710713363
1985	733680308
1986	701696498
1987	657293092
1988	575161656
1989	664345457
1990	709430766.8
1991	681748608.27
1992	724014592.34
1993	644175078.48
1994	738546462.17
1995	657084604.3000001
1996	768732511.19
1997	772123276.54
1998	788079313.2900001
1999	759780495.45
2000	782379049.81
2001	753900069.6500001
2002	729174821.04
2003	741062833.93
2004	873100909.4300001
2005	810769699.1899999
2006	771821176.95
2007	824440604.48
2008	873921189.04
2009	874108978.56
2010	834083299.65
2011	829823165.74
2012	809635657.13
2013	912824592.38
2014	930625422.8000001
2015	913235027
2016	969232290.31
2017	921681592.3199999
2018	880473231.8799999
2019	889891503.6200001
2020	900267241.21
2021	923836871.46
2022	898203750.5500001