Year	metric tons
1961	1097075
1962	1133343
1963	1205214
1964	1121782
1965	1265608
1966	1236617
1967	1217718
1968	1448255
1969	1607152
1970	1697623
1971	1829005
1972	1852324
1973	1995463
1974	2118257
1975	2011318
1976	2020500
1977	1916000
1978	1509900
1979	2103000
1980	2052604
1981	2027900
1982	1892604
1983	1754325
1984	1593674
1985	1770367
1986	1744215
1987	1656699
1988	1728239
1989	1777444
1990	1919984
1991	1961354
1992	2048732
1993	2142447
1994	2178788
1995	2170271
1996	2273489
1997	2167615
1998	1994240
1999	2093641
2000	2205800
2001	2161995
2002	2267351
2003	2329000
2004	2336000
2005	2389000
2006	2267000
2007	2407075
2008	2385959
2009	2547439
2010	2512432
2011	2635830
2012	2682983
2013	2690153
2014	2904171
2015	2803864
2016	2804473
2017	2643073.52
2018	2708108.65
2019	2413367.87
2020	2424599.27
2021	2516315.65
2022	2427607.73