Year	metric tons
1960	13871
1961	15254
1962	15185
1963	17282
1964	18812
1965	17873
1966	16430
1967	15247
1968	16444
1969	17108
1970	18861
1971	20831
1972	22806
1973	24661
1974	24176
1975	25347
1976	29021
1977	33386
1978	36458
1979	40153
1980	43979
1981	48297
1982	54006
1983	57269
1984	64142
1985	80629
1986	86914
1987	93573
1988	103775
1989	109559
1990	112076
1991	105974
1992	112637
1993	101022
1994	112531
1995	132693
1996	157331
1997	155005
1998	218219
1999	297997
2000	422223
2001	448866
2002	496886
2003	588267
2004	640497.4
2005	724032
2006	800847
2007	875465.4
2008	936461.12
2009	973526.48
2010	1232582.06
2011	1310950.91
2012	1401738.6199999999
2013	1500358.35
2014	1558534.99
2015	1629152.29
2016	1897369.88
2017	1976666.77
2018	2205412.99
2019	2269832.1099999994
2020	2271194.81
2021	2266875.92
2022	1769242.11