Year	metric tons
1960	32700
1961	36500
1962	35950
1963	38250
1964	44810
1965	45930
1966	47399
1967	53857
1968	52564
1969	54405
1970	53783
1971	56665
1972	69114
1973	68181
1974	74647
1975	75053
1976	80124
1977	81893
1978	76511
1979	76144
1980	78382
1981	92256
1982	97358
1983	90926
1984	96160
1985	91388
1986	95363
1987	91250
1988	106742
1989	105374
1990	86799
1991	81262
1992	90085
1993	87825
1994	89994
1995	86562
1996	79508
1997	79981
1998	80857
1999	91920
2000	93027
2001	98030
2002	88699
2003	95587
2004	96964
2005	101718
2006	107300
2007	109847
2008	113104
2009	114314.97
2010	103790.09
2011	100559.96
2012	102560.92
2013	113420.59
2014	119209.96
2015	124998.69
2016	131229.72
2017	134047.46
2018	140543.05000000002
2019	143496.55000000002
2020	145698.04
2021	148608.78
2022	142981.80000000002