Year	metric tons
1961	141125439
1962	154337563
1963	156236958
1964	159901693
1965	167319894
1966	168130813
1967	185565835
1968	187288693
1969	190412198
1970	179240326
1971	212855278
1972	216170054
1973	213614901
1974	223939143
1975	216598191
1976	217796580
1977	226668493
1978	247999729
1979	238645459
1980	254163781
1981	242754682
1982	265275312
1983	251473022
1984	299046428
1985	279996593
1986	280021352
1987	275762403
1988	287617233
1989	285646621
1990	286180259.8
1991	301326084.24
1992	453534930.61
1993	463467044.60999995
1994	422973445.85
1995	409548030.18000007
1996	428845412.02
1997	479194526.30999994
1998	423563144.65
1999	418326337.29
2000	432961640.56
2001	478552069.59000003
2002	488504275.2
2003	418019747.23999995
2004	520989614.95
2005	483433537.3899999
2006	470216341.40999997
2007	456291792.0399999
2008	563513971.04
2009	537234101.3399999
2010	464806104.97999996
2011	542837465.41
2012	480976935.64
2013	557810169.8199999
2014	592754061.78
2015	577920058.78
2016	584334033.0600001
2017	597555123.5
2018	567348671.51
2019	611110586.37
2020	598915816.8399999
2021	613032804.3
2022	599648939.02