Year	metric tons
1960	762676
1961	791620
1962	761211
1963	799299
1964	807550
1965	856899
1966	902398
1967	925307
1968	938596
1969	855694
1970	858902
1971	846574
1972	854245
1973	892060
1974	884204
1975	879330
1976	861687
1977	837277
1978	860788.3
1979	838058.3
1980	859149.9
1981	873521.88
1982	860781.64
1983	884173.47
1984	870403.54
1985	922169.4
1986	960355.58
1987	926785.48
1988	968697.08
1989	944719.4
1990	955874.8
1991	902400.5
1992	918553.5
1993	957508.5
1994	984874.6
1995	969245.3
1996	928743.9
1997	929721.5
1998	878266.5
1999	921896.8
2000	961254.6
2001	923560.7
2002	953683
2003	948639.7
2004	907065.2
2005	843407.8
2006	832528.9
2007	791136.7
2008	738411.4
2009	674201.3
2010	655652.5
2011	695668.22
2012	678460.7
2013	740921.01
2014	728464.9
2015	705140.64
2016	739095.69
2017	742968.1100000001
2018	766121.48
2019	720260.9199999999
2020	669512.04
2021	704111.64
2022	735365.8300000001