Year	metric tons
1960	2085
1961	2283
1962	2501
1963	2727
1964	2960
1965	3194
1966	3434
1967	3697
1968	3960
1969	4314
1970	4637
1971	5053
1972	5805
1973	6734
1974	7963
1975	8945
1976	10025
1977	10902
1978	11733
1979	12588
1980	13626
1981	14749
1982	15931
1983	17415
1984	19274
1985	22507
1986	22241
1987	21246
1988	27293
1989	42410
1990	26657
1991	40518
1992	127743
1993	150190
1994	141534
1995	146236
1996	152432
1997	165684
1998	165588
1999	180921
2000	195395
2001	218510
2002	294239.76
2003	353828.1
2004	535603.4
2005	637032.8
2006	749070.1
2007	778595.4
2008	909390.94
2009	1023342.3600000001
2010	1157723.03
2011	1155208.64
2012	1278209.3799999997
2013	1337934.6500000001
2014	1429740.1899999997
2015	1451570.75
2016	1467478.79
2017	1487773.37
2018	1563989.58
2019	1522057.5799999998
2020	1569544.54
2021	1613868.1700000002
2022	1571786.2500000002