Year	metric tons
1960	568602
1961	629954
1962	777402
1963	840080
1964	862798
1965	830021
1966	840667
1967	1059777
1968	1454630
1969	1264254
1970	1217228
1971	1388991
1972	1429006
1973	1430485
1974	1823180
1975	1751851
1976	1905048
1977	1792979
1978	1734709
1979	1724138
1980	2013518
1981	1838243
1982	1909718
1983	1845546
1984	1827875
1985	1772745
1986	1825356
1987	1681965
1988	1945755
1989	1896235
1990	1475700
1991	1751146
1992	1953827
1993	1614289
1994	1873316
1995	1999033
1996	1681518
1997	1826852
1998	1557335
1999	1405000
2000	1534089
2001	1510694
2002	1442348
2003	1031221
2004	1090596
2005	910598
2006	867721
2007	653053
2008	690584
2009	777752
2010	828089
2011	716387
2012	502790
2013	668480
2014	745343
2015	868986
2016	670223
2017	904489
2018	789182
2019	638418
2020	732900.39
2021	466408.13
2022	458193