Year	metric tons
1960	25500
1961	30400
1962	21500
1963	16900
1964	17300
1965	18300
1966	20350
1967	21150
1968	18250
1969	23150
1970	24234
1971	23715
1972	28313
1973	31243
1974	35758
1975	37693
1976	35122
1977	43475
1978	34143
1979	38678
1980	48000
1981	56000
1982	64500
1983	65000
1984	65500.9
1985	66000.6
1986	65261.8
1987	94093.8
1988	106437.3
1989	99187.42
1990	90196.24
1991	79702
1992	95273.91
1993	101899.97
1994	135409.86
1995	105878.67
1996	81995.8
1997	91585.4
1998	92337
1999	102399
2000	113159.9
2001	133628
2002	134324.8
2003	140959
2004	113464.2
2005	126260.3
2006	145763.8
2007	147363.13
2008	138862.43
2009	127777
2010	93464
2011	101814.86
2012	105543.4
2013	100973.14
2014	97683.17
2015	95798.9
2016	100004.86
2017	103875.32
2018	115057.99
2019	100553.1
2020	71518.72
2021	79200
2022	80790