Year	metric tons
1961	557000
1962	528000
1963	535000
1964	754000
1965	763000
1966	774000
1967	833000
1968	796000
1969	921503
1970	928231
1971	837284
1972	843330
1973	910310
1974	931914
1975	938000
1976	691325
1977	727621
1978	753380
1979	898610
1980	1081495
1981	1187445
1982	1127049
1983	1132450
1984	1355005
1985	1428510
1986	1490981
1987	1242881
1988	1054211
1989	1447954
1990	1558061
1991	1292405
1992	1561060
1993	1298250
1994	1632811
1995	1468204
1996	1491595
1997	1738300
1998	1784400
1999	2198925
2000	2318700
2001	2446569
2002	2540622
2003	2518278
2004	2732500
2005	2940560
2006	3113650
2007	3398240
2008	4077685
2009	4279186
2010	4091515
2011	4161995
2012	4614695
2013	4628645
2014	5414864.74
2015	5618250
2016	5701160
2017	5232304
2018	4566380
2019	4328125
2020	4202725
2021	4030147
2022	4057610