Year	metric tons
1960	12868580.01
1961	14959032
1962	17325120
1963	17998754
1964	21687896
1965	20179552
1966	23033176.01
1967	24776918
1968	26674755
1969	25415117
1970	28724631
1971	27969908
1972	22538453
1973	21065978
1974	23856491
1975	23225205
1976	24715960
1977	24700149.990000002
1978	26991317.910000004
1979	27939867.81
1980	27889490.1
1981	29194320.08
1982	31180470.64
1983	30874966.390000004
1984	34670311.97
1985	37729087.220000006
1986	41932073.71999999
1987	42643974.84
1988	46940240.85
1989	49737358.51
1990	49054560.87
1991	52761815.230000004
1992	65088601.40999999
1993	70083904.45
1994	80010139.24
1995	83630085.49000001
1996	88257058.82000001
1997	86905199.16000001
1998	82961080.50999999
1999	91814617.6
2000	95818162.17
2001	94816853.21
2002	98447145.94999999
2003	98208221.50999998
2004	106844090.53000002
2005	109810485.64999999
2006	111041194.79999998
2007	114251286.11000001
2008	118108962.62
2009	121243430.15
2010	122423969.26999998
2011	130285061.57000001
2012	133500966.24
2013	140852396.42
2014	144689248.30000004
2015	149896086.69000003
2016	152712499.9
2017	157579675.42
2018	163649769.92000002
2019	164291759.31999996
2020	165800427.43
2021	170435209.43
2022	173015878.00000003