Year	metric tons
1960	227752
1961	228163
1962	246936
1963	263926
1964	299928
1965	327834
1966	379618
1967	389040
1968	397033
1969	414853
1970	463841
1971	557964
1972	593567
1973	623930
1974	599882
1975	598927
1976	648233
1977	682604
1978	730823
1979	755048
1980	740454
1981	793266
1982	813613
1983	871173
1984	884292
1985	915606
1986	967747.4
1987	986888.5
1988	1040073
1989	1060525.3
1990	1187277.81
1991	1153926.48
1992	1190626.2
1993	1214947.69
1994	1206326.31
1995	1294685.4
1996	1279711.8
1997	1381512.09
1998	1542745.74
1999	1602411.7600000002
2000	1624814.29
2001	1563432.2000000002
2002	1602883.74
2003	1548907.36
2004	1676224.1
2005	1707241.49
2006	1809771.7
2007	1713525.15
2008	1787407.51
2009	1806075.72
2010	1842045.95
2011	1918141.79
2012	1962293.79
2013	2054400.6099999999
2014	2170335.1999999997
2015	2077579.74
2016	2191016.5700000003
2017	2470427.37
2018	2379309.22
2019	2238095.36
2020	2118758.28
2021	2122383.9199999995
2022	2162710.9400000004