Year	metric tons
1960	351678
1961	372796
1962	384268
1963	390210
1964	443471
1965	432425
1966	526461
1967	465264
1968	433488
1969	445790
1970	471277
1971	449636
1972	491569
1973	636961
1974	608853
1975	557857
1976	635712
1977	622444
1978	640513.9
1979	706033.7999999999
1980	755739.1
1981	786626.0800000001
1982	817201.64
1983	912461.2400000001
1984	948127.8800000001
1985	1022561.99
1986	1185739.55
1987	1179584.0499999998
1988	1324857.6500000001
1989	1307083.3199999998
1990	1372183.06
1991	1441189.55
1992	1462317.81
1993	1581652.32
1994	1749635.47
1995	1903365.68
1996	1690236.21
1997	1909054.51
1998	1871398.7000000002
1999	1950634.48
2000	2090657.93
2001	2355156.9899999998
2002	2217242.9699999997
2003	2245293.72
2004	2244778.57
2005	2352687.61
2006	2310263.94
2007	2200756.82
2008	2252313.88
2009	2478745.61
2010	2406181.91
2011	2269334.44
2012	2608919
2013	2730155.1799999997
2014	2863249.42
2015	2815799.84
2016	2935380.1199999996
2017	2979273.2
2018	3031634.5200000005
2019	3146343.5
2020	3012206.05
2021	3086753.9400000004
2022	2510702.09