Year	metric tons
1961	139700
1962	150800
1963	147800
1964	236680
1965	242600
1966	188660
1967	272370
1968	238802
1969	217533
1970	303018
1971	338000
1972	271475
1973	316539
1974	374822
1975	382564
1976	446457
1977	506601
1978	459540
1979	463665
1980	484479
1981	467375
1982	556650
1983	447531
1984	448828
1985	570883
1986	572018
1987	679330
1988	895295
1989	843403
1990	779265
1991	689192
1992	778097
1993	951831.8
1994	931695
1995	1130558.04
1996	1296764.45
1997	1560599.2
1998	1204788.79
1999	1147634.48
2000	1013677
2001	1628020
2002	1548965
2003	1908170
2004	1979103
2005	1749200
2006	2423773.29
2007	2963942.5
2008	3442536
2009	3166135
2010	4975564
2011	5367547
2012	5160750
2013	6272395
2014	4931500
2015	7090736
2016	7262200
2017	7207780
2018	7069529
2019	8112030
2020	8433186
2021	6304401
2022	7907177.13