Year	metric tons
1960	1219
1961	1325
1962	1322
1963	1634
1964	1420
1965	1228
1966	1312
1967	1414
1968	1228
1969	1135
1970	1212
1971	1247
1972	1247
1973	1644
1974	1546
1975	1529
1976	1571
1977	1483
1978	1079
1979	1322
1980	1078
1981	942
1982	1216
1983	999
1984	1226
1985	2585
1986	1168
1987	1052
1988	896
1989	941
1990	796
1991	773
1992	579
1993	845
1994	2365
1995	4636
1996	9199
1997	1040
1998	1180
1999	1247
2000	1074
2001	902
2002	1085
2003	1138
2004	1138
2005	1406
2006	1332
2007	1235
2008	1391
2009	1641
2010	1836
2011	1920
2012	2200.13
2013	2355.77
2014	2405.3
2015	2563.39
2016	3562.27
2017	2163.62
2018	2731.85
2019	2491.86
2020	2103.23
2021	2502.89
2022	2809.21