Year	metric tons
1960	259939
1961	277945
1962	325089
1963	333643
1964	358875
1965	375155
1966	354708
1967	358546
1968	404720
1969	420657
1970	470838
1971	460762
1972	557601
1973	554461
1974	582927
1975	635559
1976	615126
1977	687530
1978	723955
1979	695902
1980	717360
1981	777779
1982	831596
1983	849172
1984	856133
1985	929711
1986	941113
1987	953813
1988	979774
1989	960753
1990	981107
1991	973162
1992	959532
1993	937193
1994	1028003
1995	1095812
1996	1125350
1997	1130071
1998	1246942
1999	1282550
2000	1255292
2001	1228144
2002	1104977
2003	1174020
2004	1126405
2005	1109561
2006	1142515.2
2007	1160075.4
2008	1083736.7999999998
2009	1122193.32
2010	1073448.2299999997
2011	1054164.4
2012	1020504.9200000002
2013	996733.8899999998
2014	1050450.1800000002
2015	1065611.18
2016	1126663.73
2017	1162312.42
2018	1195296.62
2019	1144020.0199999998
2020	1103579.71
2021	1146407.44
2022	1121303.57