Year	metric tons
1960	1285571
1961	1131648
1962	1112109
1963	1249594
1964	1433090
1965	1596011
1966	1796703
1967	1827917
1968	1879836
1969	2132098
1970	2150504
1971	2515376
1972	2722935
1973	2620269
1974	2868505
1975	3124589
1976	3201340
1977	4030064
1978	4376653
1979	4430472
1980	4877066
1981	4976029
1982	5347676
1983	6008229
1984	6926962
1985	7887753
1986	8708497
1987	9983998
1988	11345889
1989	12449774
1990	12629564
1991	14381829
1992	17602704.9
1993	20926297.03
1994	24024749
1995	27372850
1996	30066696
1997	30237519
1998	32490728
1999	35621918.019999996
2000	37676673
2001	39860380
2002	42769823.76
2003	45500017.1
2004	49572409.1
2005	52917834.419999994
2006	56301224.080000006
2007	59359414.339999996
2008	63360101.75
2009	66859197.739999995
2010	71160876.94
2011	74622743.28
2012	80678649
2013	87591729.91
2014	91917755.96000001
2015	96204297.73000002
2016	100270051.17
2017	103599394.19
2018	107221707.65999998
2019	110684763.49000001
2020	113694207.7
2021	116712580.09
2022	120232816.03999999