Year	metric tons
1960	700327
1961	812202
1962	929320
1963	879291
1964	1074832
1965	1312760
1966	1369786
1967	1029358
1968	739615
1969	831878
1970	890617
1971	839011
1972	891831
1973	1086454
1974	1129479
1975	1178872
1976	1200957
1977	1602868
1978	1804334
1979	1896148
1980	1762557
1981	1705229.79
1982	1046893.04
1983	1125320.51
1984	1832746.81
1985	1992456.82
1986	2001495.08
1987	2009451.75
1988	2141643.73
1989	1892026.7
1990	2156044.35
1991	1685570.79
1992	2776157.36
1993	3083664.6399999997
1994	2802371.3200000003
1995	2811924.98
1996	3201378.05
1997	3432851.08
1998	3062842.89
1999	3182607.62
2000	3361795.34
2001	3344543.76
2002	3740699.55
2003	3577314.02
2004	3493639.16
2005	3434092.84
2006	3073634.1000000006
2007	3124251.7900000005
2008	2940302.58
2009	2769456.39
2010	2819984.7900000005
2011	2813259.86
2012	3025401.8099999996
2013	2859320.0199999996
2014	2746499.86
2015	3173790.29
2016	2916432.72
2017	3099730.77
2018	3272190.3199999994
2019	3182549.1500000004
2020	2974867.45
2021	3228407.6800000006
2022	3372729.04