Year	metric tons
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	192366
1993	120078
1994	51036
1995	59082
1996	90051
1997	45518
1998	68094
1999	74612
2000	80984
2001	152832
2002	151896
2003	159561
2004	164685
2005	141798
2006	156772
2007	190890
2008	185768
2009	176113.6
2010	153041.99
2011	141836.61
2012	70551.96
2013	95081.88
2014	153902.8
2015	89594.17
2016	111337.74
2017	93519.07
2018	78763.68
2019	106434.56
2020	95468.76
2021	101287.83
2022	111781.15999999999