Year	metric tons
1960	196413
1961	224801
1962	220180
1963	245480
1964	250020
1965	259620
1966	291500
1967	356550
1968	366650
1969	354250
1970	384528
1971	422925
1972	458147
1973	477730
1974	441879
1975	497173
1976	538670
1977	578289
1978	826585
1979	1018607
1980	1276487
1981	1629058
1982	1422637
1983	1062998.8
1984	1127538.9
1985	1245082.3
1986	1343933.7
1987	1449654.74
1988	1377858.48
1989	1502265.7
1990	1424798.91
1991	1428316.89
1992	1219951.55
1993	1164897.58
1994	1230374.77
1995	1380514.38
1996	1500081.46
1997	1532954.36
1998	1193289.23
1999	1238927.53
2000	1349763.4
2001	1445866.5
2002	1481136.88
2003	1386469.05
2004	1289156.43
2005	1325083.51
2006	1368538.3
2007	1475194.49
2008	1586975.66
2009	1619392.83
2010	1528282
2011	1571660.63
2012	1581200.21
2013	1626418.14
2014	1529367.57
2015	1479562.95
2016	1524467.29
2017	1637380.51
2018	1699290.21
2019	1570812.84
2020	1591535.83
2021	1672265.03
2022	1683375.8