Year	metric tons
1961	420517463
1962	443249523
1963	474923496
1964	497992671
1965	496019716
1966	513863044
1967	553420201
1968	560273495
1969	575030858
1970	612618934
1971	638598221
1972	624450695
1973	654985197
1974	674285305
1975	715900758
1976	736111592
1977	735239709
1978	784184791
1979	780710387
1980	809322866
1981	851066299
1982	872535197
1983	924791806
1984	959524429
1985	959605656
1986	984485609
1987	973270634
1988	1020620612
1989	1053653889
1990	1082570264.6100001
1991	1095596617.1499999
1992	1291952821.0999997
1993	1316475207.07
1994	1284410699.37
1995	1297161265.8100004
1996	1356789318.7600005
1997	1396690397.12
1998	1369963305.3
1999	1388487211.31
2000	1352914239.4299998
2001	1427110904.64
2002	1399845461.89
2003	1410956415.7299998
2004	1497076197.0600002
2005	1537143662.45
2006	1569255201.06
2007	1611260697.42
2008	1738172321.13
2009	1707883343.7999997
2010	1723074720.4900007
2011	1844798849.9
2012	1841081505.93
2013	1948687215.2200003
2014	1986010940.87
2015	2024510857.1200001
2016	2048169987.83
2017	2149403782.38
2018	2129878612.43
2019	2170227814.200001
2020	2210552465.0499997
2021	2249542937.5300016
2022	2270415007.2500005