Year	metric tons
1960	913401
1961	978920
1962	1050006
1963	1057655.1
1964	1133309.1
1965	1255355.4
1966	1269533.8
1967	1360394
1968	1524502
1969	1481900
1970	1582266
1971	1521038
1972	1569839
1973	1598054
1974	1603741
1975	1604441
1976	1605359
1977	1531484
1978	1548919.4
1979	1360031
1980	1375641.5
1981	1396653.5
1982	1465325
1983	1408215.5
1984	1441851.5
1985	1489514.8
1986	1502394.6
1987	1539932.6
1988	1598886
1989	1530990.7
1990	1334995.2
1991	1303615.3
1992	1263181.4
1993	1228232.6
1994	1290760.3
1995	1421688.1
1996	1423196
1997	1461464.2
1998	1572775.3
1999	1511503.6
2000	1374344
2001	1401868.3
2002	1140350.5
2003	1159825.4
2004	1112879.8
2005	1078971.1
2006	1257575.56
2007	1106011.26
2008	1173604.8
2009	1199522.72
2010	1227559.69
2011	1283684.1300000001
2012	1195824.44
2013	1214336.55
2014	1347930.65
2015	1268938.26
2016	1201985.8800000001
2017	1266209.0899999999
2018	1287623.92
2019	1193951.31
2020	1074907.26
2021	1083032.77
2022	1085165.22