Year	metric tons
1960	77600
1961	85400
1962	96500
1963	89700
1964	115800
1965	110500
1966	92400
1967	85600
1968	113600
1969	105900
1970	86000
1971	95700
1972	116200
1973	113000
1974	98719
1975	112136
1976	73330
1977	109378
1978	118535
1979	97494
1980	77052
1981	109548
1982	130371
1983	119793
1984	60319
1985	116547
1986	86496
1987	99567
1988	79163
1989	108877
1990	100997
1991	51648
1992	54105
1993	71125
1994	109379
1995	83938
1996	99871
1997	98210
1998	120094
1999	108760
2000	75231
2001	57042
2002	54429
2003	66540
2004	78598
2005	71370
2006	45553
2007	56841
2008	46995.7
2009	55740.6
2010	67040.1
2011	43894.9
2012	46224.4
2013	46620
2014	63084
2015	62645
2016	62035
2017	51635
2018	53485
2019	46430
2020	40290
2021	40690
2022	39430