Year	metric tons
1961	72787
1962	80334
1963	75608
1964	89345
1965	101325
1966	98674
1967	120005
1968	116251
1969	113733
1970	145591
1971	136609
1972	123318
1973	164314
1974	162610
1975	175115
1976	172632
1977	203096
1978	224219
1979	236036
1980	257919
1981	281137
1982	301340
1983	268123
1984	302346
1985	299434
1986	300158
1987	271825
1988	265486
1989	261081
1990	196284
1991	229445
1992	261239
1993	217239
1994	218321
1995	216323
1996	228817
1997	213192
1998	188520
1999	180328
2000	163695
2001	191385
2002	157166
2003	193750
2004	174563
2005	163990
2006	182705
2007	179061
2008	182904
2009	229394
2010	226721
2011	235330
2012	224156
2013	262076
2014	275938
2015	268529.07
2016	278166
2017	289517
2018	274001
2019	274408
2020	249874
2021	263776
2022	266229.9