Year	metric tons
1960	699362
1961	752083
1962	855982
1963	964606
1964	960256
1965	999453
1966	1007880
1967	1093973
1968	1220520
1969	1148108
1970	1363396
1971	1441381
1972	1599755
1973	1848201
1974	2036637
1975	2047565
1976	2132605
1977	2294959
1978	2285361
1979	2299271
1980	2520861
1981	2773505
1982	2751006
1983	2958759
1984	3114912.45
1985	3295911.45
1986	3650702.99
1987	3574697.23
1988	3862257.96
1989	3835458.06
1990	3823226.04
1991	3950035.6
1992	4181104.99
1993	4312708.85
1994	4610710.04
1995	4733499.5
1996	4792291.75
1997	5141913.51
1998	5050468.1
1999	5196197.77
2000	5191383.09
2001	5477176.7
2002	5641725.15
2003	5775817.96
2004	6058398.29
2005	6155135.96
2006	6577673.14
2007	6872217.19
2008	6780079.84
2009	6952991.45
2010	6765310.95
2011	6963695.309999999
2012	7456864.890000001
2013	7297264.1
2014	7707199.42
2015	7840131.260000001
2016	8054348.440000001
2017	8740991.309999999
2018	8884724.54
2019	9325141.09
2020	9436856.08
2021	9683804.549999999
2022	7133486.82