Year	metric tons
1960	12200
1961	12200
1962	13100
1963	15200
1964	15200
1965	15800
1966	15300
1967	15400
1968	15800
1969	16500
1970	15628
1971	30668
1972	27271
1973	45600
1974	50027
1975	34774
1976	50671
1977	27555
1978	52224
1979	34488
1980	44620
1981	46509
1982	17589
1983	15387
1984	17663
1985	25921
1986	25815
1987	26072
1988	26526
1989	26098
1990	26562
1991	26101
1992	26541
1993	25951.69
1994	26466.31
1995	39444.66
1996	38047.45
1997	46505.43
1998	78702.55
1999	56031.37
2000	110318.38
2001	125473.88
2002	141886.41
2003	177624.56
2004	243430.37
2005	255064.49
2006	254239.7
2007	248731.15
2008	223949.51
2009	232031.72
2010	228049.95
2011	201747.33
2012	260646.93
2013	245317.58
2014	260957.58
2015	238693.97
2016	325985.47
2017	331294.56999999995
2018	336045.92
2019	289580.58
2020	220130.47
2021	191017.47
2022	240192.06