Year	metric tons
1961	70826907
1962	81902738
1963	80366208
1964	83012493
1965	85168904
1966	83077265
1967	97233861
1968	100062214
1969	99892650
1970	95446115
1971	111094691
1972	111311618
1973	114256557
1974	118522906
1975	112090605
1976	105750573
1977	112248043
1978	129526447
1979	123318138
1980	135717669
1981	124302887
1982	133786174
1983	129400209
1984	156948214
1985	150653930
1986	141714056
1987	144793592
1988	152977638
1989	151235261
1990	147824967.8
1991	158047172.63
1992	153206722.06000003
1993	156466430.35999998
1994	152169462.56000003
1995	151845832.34
1996	177128539.85999998
1997	178649860.36999997
1998	184360855.54999995
1999	174667526.93
2000	187317362.46
2001	179636360.72
2002	188677566.67
2003	163560934.26999998
2004	204719387.02
2005	179490281.3
2006	175518248.75
2007	177475495.49
2008	205171858.68
2009	192743404.60000005
2010	180048470.66
2011	182769436.34
2012	185532544.14999998
2013	195742299.66
2014	204824934.19000003
2015	199469061.3
2016	180565437.82999998
2017	182822633.62
2018	173953550
2019	190306610
2020	184624640
2021	188249820
2022	174624710