Year	metric tons
1960	167700
1961	176681
1962	171949
1963	180535
1964	208582
1965	225486
1966	318584
1967	273366
1968	231491
1969	233719
1970	258205
1971	234819
1972	275077
1973	399728
1974	288734
1975	230525
1976	288995
1977	265437
1978	298157.1
1979	290446.7
1980	335425.6
1981	395731
1982	369537
1983	459373
1984	472826.1
1985	478315.4
1986	600561
1987	499328.2
1988	556448.4
1989	527107.6
1990	575362.3
1991	604051
1992	559470.1
1993	632816.4
1994	761150.2
1995	858883.8
1996	649713
1997	793718.6
1998	716198.1
1999	749002.25
2000	916713.2
2001	1107504.9
2002	971209.6
2003	931316.6
2004	932998.7
2005	1041467
2006	892911.6
2007	893481.5
2008	1006746.7
2009	1176093.5
2010	1144394.2300000002
2011	974656.99
2012	1178164.88
2013	1276496.7
2014	1376286.05
2015	1385067.61
2016	1473464.52
2017	1403400.81
2018	1387814.9
2019	1477511.76
2020	1399150.69
2021	1434205.43
2022	1592954.21