Year	metric tons
1960	13001879.01
1961	15284335
1962	17616903
1963	18051390
1964	21261690
1965	20138937
1966	22213599.01
1967	24400547
1968	26024336
1969	24988688
1970	28237644
1971	27092629
1972	22421067
1973	21198348
1974	23269746
1975	22337472
1976	23481280
1977	22829987.99
1978	24762029.91
1979	24774828.81
1980	23985246.1
1981	24992599.08
1982	26417105.64
1983	24890519.630000003
1984	27588381.41
1985	29415287.23
1986	32707395.74
1987	33406392.719999995
1988	35895630.919999994
1989	36600937.4
1990	36851073.839999996
1991	37999025.080000006
1992	46979587.129999995
1993	49314449.089999996
1994	53846161.91000001
1995	54404097.37000001
1996	57288792.780000016
1997	56830282.59
1998	53456736.62
1999	58360064.12
2000	61181920.67
2001	58552003.76
2002	59111553.449999996
2003	57401117.65
2004	61313876.21
2005	62020982.029999994
2006	60598920.68
2007	61378584.57
2008	61701554.589999996
2009	62038269.65999999
2010	60694081.800000004
2011	64945777.68
2012	63132283.84000001
2013	64657044.95000001
2014	64388220.15999998
2015	66022441.57999999
2016	65797408.349999994
2017	67908202.93
2018	70803225.04999998
2019	67748524.88999999
2020	66220248.70999999
2021	67838292.44999999
2022	66008824.44