Year	metric tons
1960	719190
1961	765400
1962	803200
1963	837600
1964	858800
1965	932800
1966	1005100
1967	1046200
1968	1119300
1969	1152263
1970	1111801
1971	1160145
1972	1252496
1973	1337444
1974	1402893
1975	1417477
1976	1456076
1977	1505431
1978	1835135
1979	1762268
1980	1684641
1981	1845893
1982	1822134
1983	1522699.55
1984	1638062.4
1985	1578855.11
1986	1706583.93
1987	1931832.66
1988	1706753
1989	1757994
1990	1524581
1991	1396952
1992	1475746
1993	1492755
1994	1415366
1995	1482098
1996	1400178.6
1997	1414752
1998	1370907.9
1999	1434161.55
2000	1517914
2001	1512996.5
2002	1568815.5
2003	1752489.5
2004	1964544.5
2005	1985160.5
2006	1941095.5
2007	1975253.5
2008	1975106.5
2009	2085037
2010	2144055
2011	2194136.33
2012	2243647.99
2013	2318394.67
2014	2401946.7
2015	2361575.77
2016	2416620.5
2017	2508055.95
2018	2576362.7800000003
2019	2746961.52
2020	2717987.52
2021	2845544.51
2022	2384740.1500000004