Year	metric tons
1960	1595350
1961	1659388
1962	1781193
1963	1776449
1964	1981379
1965	1987485
1966	2117280
1967	2148360
1968	2285315
1969	2473374
1970	2526342
1971	2589094
1972	3024705
1973	3018949
1974	2939051
1975	2567631
1976	2475481
1977	2596325
1978	2584629
1979	2546760
1980	2515630
1981	2598644
1982	2603634
1983	2735726.69
1984	2836578.74
1985	2849663
1986	3010800.39
1987	3091320.12
1988	3139120.9699999997
1989	3229633.69
1990	3312906.36
1991	3343570.77
1992	3483240.7199999997
1993	3556195.0300000003
1994	3501775.3
1995	3682957.41
1996	3609793.05
1997	3908213.49
1998	3939375.49
1999	4452035.15
2000	4804843.85
2001	5168239.87
2002	5319109.0600000005
2003	5667869.72
2004	6153218.17
2005	6496810.640000001
2006	6607577.16
2007	6933977.68
2008	6980722.2
2009	7457900.6
2010	7580343.66
2011	7779935.11
2012	8014945.21
2013	8133194.5600000005
2014	8332603.71
2015	8360423.399999999
2016	8867712.379999999
2017	9618270.209999999
2018	9705312.25
2019	9639603.909999998
2020	9392539.67
2021	9551104.56
2022	9514860.08