Year	metric tons
1961	1926025
1962	2178426
1963	1947084
1964	2115764
1965	1779071
1966	1623393
1967	1840765
1968	1653767
1969	1617120
1970	1363046
1971	1511483
1972	1318841
1973	1359171
1974	1313654
1975	1092959
1976	1147603
1977	1121220
1978	1360650
1979	1285000
1980	1275159
1981	1274867
1982	1379392
1983	1309118
1984	1407092
1985	1132319
1986	1263482
1987	1105446
1988	1221241
1989	1367961
1990	1388200
1991	1339247
1992	1349658
1993	1466100
1994	1354800
1995	1504900
1996	1659400
1997	1450290
1998	1497400
1999	1367600
2000	1732100
2001	1671600
2002	1655207
2003	1739331
2004	1748400
2005	1705043
2006	1674669
2007	1547600
2008	1963010
2009	1994422
2010	1803153
2011	1609679
2012	1730981
2013	1755536
2014	1700506
2015	1671654
2016	1355219
2017	1392686
2018	1315250
2019	1541910
2020	1364440
2021	1336080
2022	1638280