Year	metric tons
1961	14512100
1962	13961600
1963	17331100
1964	20821300
1965	13843800
1966	17317600
1967	19575100
1968	16296600
1969	18477000
1970	19922000
1971	21975800
1972	18834100
1973	23861300
1974	23608900
1975	23040800
1976	24891700
1977	22506800
1978	27700200
1979	25071000
1980	18652400
1981	30014200
1982	34328400
1983	31687000
1984	31849300
1985	28074800
1986	26130800
1987	22947900
1988	22336300
1989	18133270
1990	19142700
1991	22838060
1992	25622020
1993	25568081
1994	23789591
1995	26281514
1996	24089764
1997	36698490
1998	40418872
1999	31936418
2000	37983923
2001	36655385
2002	35057269
2003	32473165
2004	34193141
2005	41947408
2006	32262738
2007	42067213
2008	44956952
2009	26147049
2010	39769212
2011	50916576
2012	47372117
2013	50742603
2014	50794075.58
2015	55980088.03
2016	61148032.97
2017	76397452.56
2018	70592010
2019	83616966.37
2020	85702826.46
2021	87692513.88
2022	91584182.57