Year	metric tons
1961	1483275
1962	1764009
1963	1665281
1964	1537996
1965	1595082
1966	1347319
1967	1790402
1968	1941496
1969	1555225
1970	1676672
1971	1928939
1972	1669134
1973	1529337
1974	1524470
1975	1602626
1976	1628897
1977	1017335
1978	1119802
1979	1134210
1980	1407823
1981	1089103
1982	1291407
1983	1145688
1984	1469416
1985	1379569
1986	1656348
1987	1719077
1988	1465352
1989	1833280
1990	1427010
1991	1789423
1992	1387311
1993	1478937
1994	1630319
1995	1394255
1996	1607468
1997	1509650
1998	1398328
1999	1655612
2000	1614404
2001	1303355
2002	1502831
2003	1191546
2004	1374973
2005	823081.62
2006	1197572
2007	1066037
2008	1311584
2009	1118225
2010	1019204
2011	1157421
2012	1178144
2013	1362407
2014	1333258
2015	1240203
2016	1138085
2017	1125906
2018	1114440
2019	1161140
2020	1053530
2021	1125650
2022	1018080