Year	metric tons
1961	2557300
1962	2190800
1963	2805200
1964	2963900
1965	2639000
1966	2511800
1967	2606900
1968	3405000
1969	2620600
1970	3951000
1971	2853700
1972	2006600
1973	1122700
1974	705000
1975	1145000
1976	1175000
1977	1080000
1978	1080000
1979	608000
1980	1818000
1981	1575000
1982	2000000
1983	2082000
1984	1308000
1985	1854000
1986	2144000
1987	1853000
1988	2541000
1989	2726000
1990	2588000
1991	2460000
1992	2281000
1993	2428764
1994	2268500
1995	3502700
1996	3468563
1997	3457340
1998	3558381
1999	4136174
2000	4183064
2001	4284605
2002	3971406
2003	5025548
2004	4426949
2005	6233960
2006	6641061
2007	7250000
2008	7787338
2009	8509896
2010	9018589
2011	9496000
2012	10241849
2013	10238400
2014	9798000
2015	9668100
2016	10494300
2017	11749500
2018	12123500
2019	11780700
2020	11836000
2021	12906000
2022	12787000