Year	metric tons
1960	719926
1961	767187
1962	806256
1963	842329
1964	865710
1965	942343
1966	1018341
1967	1066190
1968	1154519
1969	1203171
1970	1178012
1971	1242648
1972	1352034
1973	1455081
1974	1540133
1975	1572836
1976	1640963
1977	1719508
1978	2085200
1979	2049806
1980	2018517
1981	2241707
1982	2285726
1983	2062734.55
1984	2316073.4
1985	2311097.1100000003
1986	2547267.93
1987	2995470.66
1988	2781162
1989	2940961
1990	2406885
1991	2328371
1992	2559980
1993	2604140
1994	2212731
1995	2201514
1996	2166731.6
1997	1893586
1998	1842488.9
1999	1903934.55
2000	1981555
2001	2011876.5
2002	2079097.5
2003	2267275.5
2004	2475349.5
2005	2507497.65
2006	2486911.7
2007	2538818.2
2008	2539987.75
2009	2670211.4
2010	2752311.6
2011	2792590.0600000005
2012	2856749.8699999996
2013	2937238.42
2014	3093466.7600000002
2015	3069468.6799999997
2016	3184906.09
2017	3289512.3499999996
2018	3389442.84
2019	3563446.28
2020	3562853.5700000003
2021	3716275.07
2022	2542996.75