Year	metric tons
1960	1411417
1961	1555717
1962	1658417
1963	1765431
1964	1960723
1965	2001526
1966	2119067
1967	2434775
1968	2929685
1969	2844648
1970	2204263
1971	2101036
1972	2390521
1973	2536736
1974	2492767
1975	2200123
1976	1908731
1977	1811375
1978	1837854
1979	1764408
1980	1579661
1981	1632665
1982	1624735
1983	1767175
1984	1662072
1985	1670738
1986	1782701
1987	2483994
1988	2399252
1989	1966033
1990	1970482
1991	1820388
1992	2509770
1993	2514632
1994	2319907
1995	2270011.74
1996	2073540.95
1997	2183307.66
1998	2359556.48
1999	2462849.94
2000	2672207.91
2001	2710197.8200000003
2002	2797892.83
2003	2896765.5
2004	3100583.5700000003
2005	3009236.5
2006	2764596.5
2007	2848399.5
2008	2784653.5
2009	2708715
2010	2934848
2011	2944220.33
2012	3222700.0300000003
2013	3026225.02
2014	3274728.7399999998
2015	3411774.8600000003
2016	3509505.6000000006
2017	3609520.6599999997
2018	3602930.72
2019	3535673.9299999997
2020	3491664.8499999996
2021	3737249.1500000004
2022	3366712.63