Year	metric tons
1960	380
1961	410
1962	360
1963	380
1964	430
1965	399
1966	370
1967	360
1968	317
1969	293
1970	240
1971	220
1972	172
1973	192
1974	203
1975	219
1976	247
1977	261
1978	334
1979	402
1980	460
1981	533
1982	664
1983	931
1984	1590
1985	2167
1986	3172
1987	3977
1988	4739
1989	5974
1990	16432
1991	35358
1992	34722
1993	31630
1994	40322
1995	55725
1996	64206
1997	58162
1998	61580
1999	57177
2000	73043
2001	108641
2002	147539
2003	138491
2004	111063
2005	118111.15
2006	149446.7
2007	178596.2
2008	204898.85
2009	221829.95
2010	274901.74
2011	290897.81
2012	330663.92000000004
2013	308942.56
2014	351294.81
2015	398749.88000000006
2016	345219.45999999996
2017	345021.89
2018	330601.7
2019	339123.60000000003
2020	369846.12000000005
2021	414614.85000000003
2022	413258.19000000006