Year	metric tons
1961	96500
1962	106347
1963	84700
1964	89000
1965	80905
1966	95968
1967	91301
1968	64882
1969	44228
1970	54092
1971	52414
1972	76416
1973	65638
1974	92444
1975	82700
1976	55700
1977	60760
1978	56600
1979	48600
1980	30450
1981	29575
1982	30420
1983	27200
1984	25831
1985	34450
1986	46530
1987	70482
1988	73032
1989	79361
1990	77358
1991	83213
1992	88401
1993	80905
1994	79109
1995	100385
1996	93796
1997	89657
1998	102843
1999	93000
2000	122800
2001	152950
2002	140144
2003	145835.93
2004	165056.82
2005	177240
2006	189400
2007	153370
2008	177000
2009	146600
2010	111784.67
2011	158638.17
2012	188629.35
2013	178658.66
2014	176627.23
2015	180116.43
2016	181183.97
2017	166851.49
2018	164130
2019	165440
2020	174470
2021	133462.47
2022	133396.53