Year	metric tons
1960	668521
1961	772406
1962	887674
1963	839245
1964	1031060
1965	1271034
1966	1323382
1967	983454
1968	689231
1969	787588
1970	841937
1971	791120
1972	832501
1973	1028222
1974	1060318
1975	1102380
1976	1125471
1977	1511039
1978	1700254
1979	1780997
1980	1655663
1981	1594477
1982	939049
1983	999881.77
1984	1716254
1985	1871485
1986	1842679.39
1987	1842363
1988	1982036
1989	1725654
1990	1983155.04
1991	1472562.1
1992	2577595
1993	2894712
1994	2591862
1995	2584464
1996	2986574
1997	3164273
1998	2746732
1999	2805314
2000	3074396
2001	3044076
2002	3397078
2003	3176744
2004	2912268
2005	2867256
2006	2428270.8
2007	2325532
2008	2170666
2009	2047869.2
2010	1998706.4
2011	2058061.64
2012	2405243.48
2013	2379727.0599999996
2014	2042548.14
2015	2405147.37
2016	2202169.4
2017	2336147.69
2018	2430333.27
2019	2187886.55
2020	2010172.8
2021	2225602.38
2022	2507776.2600000002