Year	metric tons
1960	882103
1961	884140
1962	927986
1963	938837
1964	995511
1965	1045002
1966	1085803
1967	1100614
1968	1198816
1969	1253751
1970	1313526
1971	1417621
1972	1440672
1973	1520895
1974	1470147
1975	1492952
1976	1578799
1977	1565990
1978	1653975
1979	1716415
1980	1767768
1981	1731630
1982	1687750
1983	1722800.2400000002
1984	1823299.92
1985	1865755.7100000002
1986	1997169.3199999998
1987	2012141.7799999998
1988	2034172.97
1989	2155973.69
1990	2202966.3600000003
1991	2176128.77
1992	2795631.72
1993	2683989.7199999997
1994	2719581.6100000003
1995	3144366.0700000003
1996	2991745.5
1997	3190631.92
1998	3473891.0399999996
1999	3455621.52
2000	3684378.7199999997
2001	3895609.7399999998
2002	4166885.2199999997
2003	4427883.38
2004	4995125.95
2005	5182993.930000001
2006	5272455.96
2007	5363285.23
2008	5479996.65
2009	5721371.38
2010	5882524.170000001
2011	5959367.14
2012	6261944.359999999
2013	6447436.55
2014	6678461.76
2015	6644726.85
2016	6966901.27
2017	7291053.58
2018	7302264.0200000005
2019	7257023.6899999995
2020	7128164.3100000005
2021	6936603.089999999
2022	6606422.459999999