Year	metric tons
1960	7841
1961	7911
1962	9968
1963	21941
1964	21302
1965	21508
1966	26709
1967	29211
1968	29408
1969	30802
1970	34296
1971	31287
1972	32578
1973	42867
1974	51946
1975	32071
1976	34842
1977	49737
1978	59058
1979	67206
1980	125334
1981	73262
1982	57185
1983	46528
1984	67777
1985	51875
1986	52107
1987	46486
1988	47345
1989	53647
1990	52919
1991	64845
1992	79700
1993	105241
1994	114112
1995	132745
1996	109063
1997	107984
1998	133635
1999	166974
2000	167898
2001	177021
2002	183990
2003	192160
2004	202218
2005	215834
2006	228317
2007	268508
2008	354579
2009	472502.3
2010	581242.92
2011	526692.5
2012	634875.9
2013	530701.8
2014	521014.47
2015	506965.2
2016	407887.08
2017	427515.53
2018	391977.48
2019	412281.04
2020	400517.01
2021	417478.41
2022	574182.27