Year	metric tons
1961	571369
1962	623498
1963	666711
1964	726280
1965	729666
1966	674105
1967	691683
1968	789024
1969	818758
1970	890371
1971	861435
1972	918221
1973	930480
1974	932236
1975	1068282
1976	967390
1977	975732
1978	1057590
1979	1110761
1980	1081719
1981	1172390
1982	1274957
1983	1243186
1984	1149500
1985	1282503
1986	1398526
1987	1378226
1988	1385280
1989	1421351
1990	1435248
1991	1381809
1992	1513512
1993	1446343
1994	1296160
1995	1163637
1996	1139597.18
1997	953852.36
1998	1165000.83
1999	1134239
2000	1160727
2001	1294910.96
2002	1300063.77
2003	1320434.6
2004	1350217.48
2005	1446138.66
2006	1557726.92
2007	1669111.06
2008	1792388.39
2009	1703470.68
2010	1716378.83
2011	1754490.8
2012	1804109.52
2013	1876103.63
2014	1900910.37
2015	1938866.98
2016	1986485.1
2017	2037704.14
2018	2065221.14
2019	1922130.14
2020	2049882.57
2021	2130822.42
2022	2027272.24