Year	metric tons
1960	9000
1961	9000
1962	9000
1963	11300
1964	19200
1965	16800
1966	14100
1967	10200
1968	19100
1969	22002
1970	32100
1971	27200
1972	32000
1973	27700
1974	24246
1975	21832
1976	28283
1977	26101
1978	26100
1979	55228
1980	53245
1981	26219
1982	24000
1983	22500
1984	21000
1985	21441
1986	20564
1987	21250
1988	26461
1989	24555
1990	24229
1991	15235
1992	22823
1993	23941
1994	29247
1995	30808
1996	33237
1997	34702
1998	30074
1999	24606
2000	22512
2001	35300
2002	28000
2003	19200
2004	26883
2005	43949
2006	73942
2007	68842
2008	53826
2009	46977
2010	39668
2011	47831
2012	76117
2013	70913
2014	85625
2015	52099
2016	60135
2017	67034
2018	62673
2019	62338
2020	57474.17
2021	66373.69
2022	67550