Year	metric tons
1961	55289830
1962	56737088
1963	60166083
1964	61717655
1965	60455067
1966	57159263
1967	64702629
1968	63521470
1969	67094031
1970	65949997
1971	63873991
1972	63031780
1973	64858935
1974	67559051
1975	71553490
1976	72735288
1977	72976006
1978	76167813
1979	73453577
1980	83977278
1981	86245175
1982	82841640
1983	86679832
1984	83124539
1985	91131811
1986	92274629
1987	88923921
1988	99842961
1989	98446531
1990	97508836.97
1991	100479976.07999998
1992	104025142.82000001
1993	109584685.52999999
1994	109515022.97999999
1995	115250420.91
1996	122422257.02999999
1997	117570328.67
1998	125081104.03
1999	132304545.28
2000	132836908.21
2001	140691552.75
2002	144035045.46
2003	154186201.4
2004	148075175.92
2005	167854752
2006	175607688.67000002
2007	181810548.6
2008	190763675.73
2009	201768014.72
2010	214583022.84999996
2011	210154889.36
2012	217486988.96000004
2013	223979151
2014	230615884.36
2015	228627211.70999998
2016	233795521.71
2017	238339461.93
2018	247278134.93
2019	249451302.24999997
2020	259972427.81
2021	259504752.15999994
2022	257075694.02