Year	metric tons
1960	99160
1961	92580
1962	72600
1963	140920
1964	137850
1965	159763
1966	148431
1967	238044
1968	201062
1969	261053
1970	276442
1971	269584
1972	294504
1973	256984
1974	256477
1975	289115
1976	329164
1977	311932
1978	353249
1979	446009
1980	562412
1981	587769
1982	630335
1983	690208
1984	692741.09
1985	692404.12
1986	704305.13
1987	752784.4
1988	806581.8
1989	569768.7
1990	457104.69999999995
1991	426509
1992	6789872.2
1993	5579761
1994	4853625
1995	5586147.3
1996	5841270.7
1997	5739985.8
1998	5672738.5
1999	5428092.9
2000	5218247
2001	4748907.2
2002	4367514.56
2003	4367045.699999999
2004	4068570.91
2005	4282216
2006	4429438.149999999
2007	4778614.2
2008	4614065.720000001
2009	5011802.76
2010	5289432.660000001
2011	5475501.510000001
2012	5485318.58
2013	5556605.49
2014	5349911.369999998
2015	5674597.82
2016	5907228.890000001
2017	6185561.48
2018	6507837.25
2019	6722169.83
2020	6769709.999999999
2021	6919749.039999999
2022	6789560.5600000005