Year	metric tons
1961	98408
1962	101378
1963	104458
1964	107233
1965	110113
1966	113000
1967	116100
1968	120200
1969	123000
1970	126000
1971	128900
1972	132000
1973	134900
1974	138200
1975	141100
1976	143600
1977	146900
1978	150100
1979	154100
1980	158100
1981	163700
1982	166230
1983	171700
1984	178891
1985	167300
1986	164350
1987	139700
1988	94871
1989	94800
1990	121320
1991	100025.47
1992	101312.04
1993	116779.57
1994	131911.14
1995	149534.32
1996	162306.75
1997	169824.81
1998	168080.92
1999	151252.3
2000	106650
2001	115000
2002	91437
2003	106447
2004	153969
2005	192631
2006	184653
2007	190853
2008	166007
2009	143552
2010	144634
2011	184333
2012	167800
2013	171148.72
2014	170212.58
2015	175635.48
2016	176187.02
2017	192713
2018	125754.52
2019	103288.31
2020	103397.48
2021	77677.47
2022	71364.7