Year	metric tons
1960	1161400.01
1961	961000
1962	973900
1963	1045800
1964	1321600
1965	1331300
1966	1367200.01
1967	1400400
1968	1525600
1969	1605000
1970	1758500
1971	1853000
1972	1639100
1973	1960700
1974	2256991
1975	2267192
1976	2177096
1977	2314702.99
1978	2309709.01
1979	2343292.01
1980	2445337
1981	2448342
1982	2369320
1983	2508598.5
1984	2874519.1
1985	2839347.6
1986	3007532.89
1987	2994385
1988	3200962
1989	3718189
1990	3879722
1991	4132494
1992	4324546.01
1993	4566914
1994	4867135
1995	5016546.99
1996	5301687
1997	5485270
1998	5381977
1999	5686963
2000	5668958
2001	5937726
2002	5973298
2003	6074846
2004	6230871
2005	6698487.99
2006	7060154
2007	7005055
2008	7984490
2009	7893598
2010	8505837
2011	8013716
2012	9109122.41
2013	9157940.43
2014	9883495.43
2015	10206040.51
2016	10898848.01
2017	11763822.01
2018	12584085
2019	13410100.02
2020	13299483.01
2021	14433204.98
2022	15774324.95