Year	metric tons
1961	16687031
1962	23456648
1963	22676291
1964	21495445
1965	23552448
1966	20786181
1967	23555663
1968	28631568
1969	25502066
1970	24978323
1971	25117010
1972	30800751
1973	24177705
1974	27739267
1975	29440413
1976	33015527
1977	24787483
1978	29411721
1979	27889603
1980	31871630
1981	29621108
1982	32076295
1983	29406332
1984	28168845
1985	35891292
1986	38183115
1987	35166826
1988	40246266
1989	36253535
1990	44065206
1991	50216853.599999994
1992	47721721.94
1993	47770339.120000005
1994	52363816.65
1995	47707642.67
1996	60579361.18
1997	47505962.07
1998	57271817.45999999
1999	47234730.08
2000	42576752.029999994
2001	50287439.19
2002	59012554.54
2003	66850167.449999996
2004	67179815.33000001
2005	64732840.01
2006	71292833.44
2007	64059101.309999995
2008	50128453.800000004
2009	67481250.86
2010	61938013.91000001
2011	62751238.31
2012	63188455.099999994
2013	68864963.52
2014	64661185.04
2015	67053593.980000004
2016	61769867.54
2017	63462907.35
2018	59409955.79
2019	71528768.65
2020	62916118.45
2021	62015246.529999994
2022	55298616.440000005