Year	metric tons
1960	12600
1961	13500
1962	18400
1963	20100
1964	20700
1965	23400
1966	27900
1967	27300
1968	28200
1969	32000
1970	33700
1971	28300
1972	30000
1973	29000
1974	28581
1975	27373
1976	41164
1977	43009
1978	46425
1979	51735
1980	47875
1981	57900
1982	81718
1983	98357
1984	91127
1985	106251
1986	120244
1987	131692
1988	138391
1989	146193
1990	201542
1991	198479
1992	162967
1993	182909
1994	203362
1995	193282.74
1996	181463.35
1997	161588.66
1998	173154.58
1999	205927.39
2000	215798.91
2001	164760.32
2002	145164.33
2003	120532
2004	127297.07
2005	147920
2006	159266
2007	132282
2008	136109
2009	134157
2010	140607
2011	181450
2012	158743
2013	163133
2014	169169.1
2015	165152
2016	135106.19
2017	154889.14
2018	136213.52
2019	130730.83
2020	130165.36
2021	141296.9
2022	145801.47