Year	metric tons
1961	16730306
1962	29261250
1963	34122307
1964	28504578
1965	32228771
1966	38663261
1967	30080426
1968	34413439
1969	35922333
1970	28560715
1971	38859750
1972	35466355
1973	36600202
1974	30864826
1975	37107574
1976	44710278
1977	42239008
1978	41895782
1979	35955000
1980	41364700
1981	50862200
1982	53333208
1983	47447208
1984	42793504
1985	48239300
1986	56964700
1987	51635200
1988	35494200
1989	48089308
1990	56806235
1991	53852300
1992	49642650
1993	51483100
1994	46618500
1995	49344200
1996	58494100
1997	49606900
1998	50984500
1999	54112600
2000	51090400
2001	43391400
2002	36046900
2003	49197200
2004	50778200
2005	50962400
2006	48577300
2007	48005300
2008	56030400
2009	49691900
2010	46122200
2011	48337200
2012	51846500
2013	66535401
2014	51683501
2015	53563000
2016	58905767.63
2017	56770935
2018	58726900
2019	61473900
2020	65314300
2021	47546138
2022	65040432