Year	metric tons
1960	669500
1961	694750
1962	748950
1963	799750
1964	866200
1965	926150
1966	987700
1967	1046976
1968	1091576
1969	1194754
1970	1270856
1971	1358025
1972	1481518
1973	1511938
1974	1517330
1975	1567871
1976	1530064
1977	1618541
1978	1624673
1979	1576492
1980	1546694
1981	1525099
1982	1535880
1983	1596516.1
1984	1693951
1985	1672726
1986	1828413
1987	1949401.9
1988	1921564.9
1989	1987602.9
1990	2100210
1991	2064643
1992	2272463
1993	2212249
1994	2119336
1995	2277912
1996	2482009.6
1997	2510574
1998	2430047.9
1999	2597061.55
2000	2689971
2001	2719023.5
2002	2659804.5
2003	2904754.5
2004	3038435.9
2005	3051438.54
2006	3036362.69
2007	3106883.21
2008	3233790.89
2009	3351075.31
2010	3470579.44
2011	3654092.89
2012	3761674.59
2013	3812839.6999999997
2014	3981812.2300000004
2015	4013891.91
2016	4121518.88
2017	4572582.559999999
2018	4599292.029999999
2019	4814063.93
2020	4733833.23
2021	5050758.38
2022	4974978.109999999