Year	metric tons
1961	36858905
1962	40231830
1963	39025274
1964	39790686
1965	39869938
1966	35089869
1967	41437445
1968	39720263
1969	43687499
1970	41468273
1971	41362632
1972	41938526
1973	39859092
1974	46444139
1975	44836952
1976	46551101
1977	43629816
1978	45407319
1979	44113957
1980	53101116
1981	56216528
1982	52522297
1983	53304237
1984	49573016
1985	60165190
1986	64067784
1987	59461377
1988	70914363
1989	62815792
1990	65274818.97
1991	68805960.72
1992	106014486.40000002
1993	118334239.55000001
1994	112530538.63999999
1995	112863950.99
1996	109322820.15999998
1997	115878083.52999999
1998	110708054.9
1999	108224275.86
2000	104731914.88
2001	128260796.08
2002	129382709.59000002
2003	128178262.53999999
2004	140530013.82
2005	151567739.46999994
2006	156657024.35999998
2007	151272667.49
2008	174545739.84
2009	166245339.89
2010	169591572.54999995
2011	177844350.39000002
2012	172916370.39000002
2013	193057800.57
2014	204752805.88
2015	193672685.14000002
2016	208752065.23000005
2017	203384141.05999997
2018	217189425.60000002
2019	227108022.64
2020	220749579.75
2021	232015533.17999995
2022	203097330.46