Year	metric tons
1960	9512657
1961	11692646
1962	13705562
1963	14005303
1964	16719033
1965	15601446
1966	17462807
1967	19534312
1968	20779270
1969	19591125
1970	22601505
1971	21371995
1972	16299401
1973	14404352
1974	16621222
1975	16225706
1976	17424725
1977	17176771
1978	18929175
1979	18920786
1980	18408888
1981	18916040
1982	20442077
1983	19020343.8
1984	22008130.47
1985	24579226.54
1986	27855011.41
1987	29075367.150000002
1988	32607669.900000002
1989	33414387.99
1990	33871042.38
1991	36289745.660000004
1992	47224838.410000004
1993	52466309.19
1994	59692406.16
1995	62772302.97
1996	68081957.41
1997	67166157.66
1998	65681845.440000005
1999	72247150.05
2000	76192163
2001	74532323.7
2002	77380593.67999999
2003	77117753.44999999
2004	83396009.28999999
2005	85806273.91
2006	86481264.68
2007	89317906.75
2008	91573348.01
2009	94401773.96
2010	95611876.85999998
2011	103246470.56000002
2012	105035412.61
2013	112711131.16000003
2014	114935573.27999999
2015	120058472.18000004
2016	122024726.71000004
2017	124790445.53999999
2018	129464510.19999999
2019	128617863.19999999
2020	130059703.24000001
2021	133234691.49000001
2022	135154688.68999997