Year	metric tons
1961	517800
1962	697400
1963	514700
1964	632200
1965	557900
1966	566600
1967	672800
1968	652600
1969	640400
1970	633700
1971	743000
1972	738400
1973	749600
1974	856800
1975	756900
1976	795500
1977	690000
1978	835100
1979	875000
1980	789100
1981	863500
1982	928900
1983	899600
1984	1118200
1985	1054400
1986	959900
1987	939000
1988	1243700
1989	1410700
1990	1268000
1991	1273639
1992	1182772
1993	1252968
1994	1213740
1995	1245612
1996	1317471
1997	1194083
1998	1240975
1999	1028481
2000	1169500
2001	1079600
2002	1087700
2003	847200
2004	1089000
2005	1056500
2006	1013200
2007	1012697
2008	1002471
2009	1006184
2010	924003
2011	999472.67
2012	950518.46
2013	867293.65
2014	994310.67
2015	909943.14
2016	743880
2017	976614
2018	895098
2019	932966
2020	1010995
2021	783794
2022	865538