Year	metric tons
1960	167700
1961	176681
1962	171949
1963	180535
1964	208582
1965	225486
1966	318580
1967	273356
1968	231475
1969	233697
1970	258177
1971	234784
1972	275036
1973	399681
1974	288681
1975	230466
1976	288930
1977	265361
1978	298072.1
1979	290355.7
1980	335327.6
1981	395626
1982	369420
1983	459245
1984	472646.1
1985	478155.4
1986	600413
1987	499174.2
1988	556290.4
1989	526948.6
1990	574947.3
1991	603392
1992	558729.1
1993	631623.4
1994	759687.2
1995	856811.8
1996	647629
1997	791389.6
1998	714037.1
1999	746209.25
2000	914824.2
2001	1106101.9
2002	969539.6
2003	929778.6
2004	931280.7
2005	1039210
2006	891750.6
2007	891845.5
2008	1006167.7
2009	1175436.5
2010	1143652.11
2011	974039.99
2012	1177472.38
2013	1275508.7
2014	1375097.05
2015	1384017.61
2016	1472314.42
2017	1402130.8
2018	1386548
2019	1475913.65
2020	1397532.69
2021	1432199.14
2022	1590644.21