Year	metric tons
1960	196513
1961	224915
1962	220300
1963	245600
1964	250100
1965	259700
1966	291600
1967	356700
1968	366800
1969	354400
1970	385068
1971	423585
1972	458856
1973	479714
1974	443705
1975	500013
1976	541156
1977	581249
1978	831426
1979	1025373
1980	1285113
1981	1640147
1982	1435149
1983	1076677.8
1984	1138003.9
1985	1256312.3
1986	1357456.7
1987	1465561.74
1988	1394979.48
1989	1520514.7
1990	1447146.91
1991	1453288.89
1992	1246527.55
1993	1192965.58
1994	1262041.77
1995	1406094.38
1996	1531420.46
1997	1572454.36
1998	1234357.23
1999	1287370.53
2000	1403681.4
2001	1521929.5
2002	1554806.88
2003	1470939.05
2004	1393504.43
2005	1458214.51
2006	1522989.3
2007	1615256.74
2008	1746284.71
2009	1776349.4700000002
2010	1654520
2011	1708788.63
2012	1724946.85
2013	1737917.89
2014	1723597.33
2015	1691184.5899999999
2016	1745794.79
2017	1880687.83
2018	1946512.63
2019	1874459.54
2020	1940137.58
2021	1912067.74
2022	1972994.33