Year	metric tons
1960	1000
1961	1300
1962	2100
1963	2500
1964	2700
1965	2100
1966	3000
1967	2500
1968	1900
1969	3000
1970	3400
1971	3300
1972	3100
1973	3700
1974	3881
1975	4530
1976	3653
1977	3074
1978	5504
1979	4898
1980	3507
1981	4273
1982	4293
1983	2388
1984	3024
1985	3166
1986	2647
1987	3077
1988	3725
1989	4327
1990	7798
1991	7344
1992	7813
1993	10868
1994	11604
1995	11928
1996	11074
1997	11303
1998	13971
1999	25868
2000	43166
2001	34804
2002	31405
2003	30042
2004	14920
2005	27987
2006	33862
2007	34365
2008	42018
2009	36772
2010	45124.229999999996
2011	41312.509999999995
2012	33034.25
2013	37448.39
2014	39470.6
2015	37401.36
2016	39430.590000000004
2017	41735.72
2018	42392.13
2019	46714.26
2020	45140.61
2021	43665.51
2022	58570.04