Year	metric tons
1961	47046989
1962	47934609
1963	52759730
1964	59507028
1965	57464389
1966	59183445
1967	64009803
1968	62046356
1969	64354319
1970	70893048
1971	72007043
1972	67538895
1973	74457375
1974	77897015
1975	80002438
1976	86205495
1977	85985270
1978	85276117
1979	83473907
1980	87860369
1981	102946743
1982	104630751
1983	98961351
1984	105660894
1985	109369625
1986	104790609
1987	111165629
1988	107401047
1989	105121929
1990	97538498
1991	103050249.45
1992	117514558.77000001
1993	115375881.06999998
1994	118137058.77999999
1995	125292185.72999999
1996	118990021.79
1997	133170611.93000002
1998	132535383.71
1999	130153403.37
2000	136878765.51999998
2001	150624756.10999998
2002	140767732.48000002
2003	159671726.13
2004	160012719.45999998
2005	156746169.5
2006	154445702.67
2007	177500047.77999997
2008	194867260.58
2009	163393103.23000002
2010	186231982.85999998
2011	193489235.56
2012	208531617.46000004
2013	224223659.36000004
2014	226662610.89000005
2015	236385319.11999997
2016	222911566.33999997
2017	270552403.68
2018	248269564.84999996
2019	280172911.17
2020	288080650.25
2021	277249229.37
2022	303598221.42999995