Year	metric tons
1961	1850
1962	1891
1963	1871
1964	1788
1965	1886
1966	1847
1967	1927
1968	1977
1969	2251
1970	2963
1971	4358
1972	3127
1973	2708
1974	2477
1975	3826
1976	2769
1977	3616
1978	4905
1979	3434
1980	3608
1981	4082
1982	3486
1983	3812
1984	2369
1985	2278
1986	2199
1987	2450
1988	2900
1989	3500
1990	4120
1991	4720
1992	5420
1993	6030
1994	6850
1995	7650
1996	8650
1997	9600
1998	9810.89
1999	10550
2000	11300
2001	12600
2002	12804.86
2003	10300
2004	10479.67
2005	11671.73
2006	12250.1
2007	13241.84
2008	14300
2009	15202.12
2010	15919.12
2011	18204.77
2012	15270.72
2013	17364.67
2014	17752.75
2015	18190.15
2016	17943.56
2017	18502.82
2018	18366.63
2019	18288.65
2020	18398.47
2021	18361.86
2022	18357.45