Year	Tonnes
1904	3.667
1908	3.667
1913	14.668
1914	29.336
1915	51.338
1916	80.674
1917	80.674
1918	216.353
1919	212.686
1920	150.347
1921	161.348
1922	205.352
1923	451.041
1924	385.035
1925	674.728
1926	1070.764
1927	1015.759
1928	1903.173
1929	1950.844
1930	0
1931	0
1932	3810.013
1933	2823.59
1934	5229.142
1935	5995.545
1936	3168.288
1937	9405.855
1938	6127.557
1939	7003.97
1940	12354.123
1941	15071.37
1942	11558.384
1943	10340.94
1944	15137.376
1945	15768.1
1946	80116.616
1947	20513.198
1948	25573.658
1949	28741.946
1950	38309.149
1951	47421.644
1952	50787.95
1953	47898.354
1954	51246.325
1955	59805.103
1956	65067.248
1957	69647.331
1958	54506.288
1959	65210.261
1960	57069.521
1961	51928.387
1962	54106.585
1963	56204.109
1964	56603.812
1965	60787.859
1966	57029.184
1967	65815.316
1968	65635.633
1969	68998.272
1970	74561.111
1971	62562.687
1972	62577.355
1973	66501.045
1974	75133.163
1975	63816.801
1976	57344.546
1977	63732.46
1978	68690.244
1979	76570.627
1980	90802.254
1981	91968.36
1982	93405.824
1983	93101.463
1984	93218.807
1985	101278.873
1986	109529.623
1987	110981.755
1988	116097.22
1989	108854.895
1990	122162.438
1991	115440.827
1992	105972.633
1993	124391.974
1994	129965.814
1995	133350.455
1996	122804.163
1997	133988.513
1998	167339.878
1999	173122.737
2000	152422.522
2001	172587.355
2002	193316.906
2003	192103.129
2004	151733.126
2005	165095.674
2006	169514.409
2007	160786.949
2008	179114.615
2009	179789.343
2010	189070.52
2011	176822.74
2012	198766.068
2013	183922.052
2014	185220.17