Year	Tonnes
1946	2456.89
1947	6754.614
1948	337.364
1949	1063.43
1950	385.035
1951	117.344
1952	0
1953	0
1954	1404.461
1955	1848.168
1956	1041.428
1957	2200.2
1958	3692.669
1959	3802.679
1960	7803.376
1961	9981.574
1962	14290.299
1963	17025.881
1964	25335.303
1965	35419.553
1966	35151.862
1967	25441.646
1968	22442.04
1969	26831.439
1970	25041.943
1971	27139.467
1972	27634.512
1973	24242.537
1974	19328.757
1975	16827.863
1976	18474.346
1977	17220.232
1978	21000.909
1979	17667.606
1980	24675.243
1981	25214.292
1982	21169.591
1983	21609.631
1984	28367.912
1985	29159.984
1986	35320.544
1987	31470.194
1988	32914.992
1989	35885.262
1990	51000.636
1991	10190.593
1992	21085.25
1993	33274.358
1994	38906.87
1995	54821.65
1996	50153.559
1997	54920.659
1998	51745.037
1999	54022.244
2000	53560.202
2001	57641.573
2002	58228.293
2003	59922.447
2004	63534.442
2005	71546.837
2006	73769.039
2007	75235.839
2008	82731.187
2009	87303.936
2010	89625.147
2011	91029.608
2012	102334.969
2013	98345.273
2014	95408.006