Year	Tonnes
1908	0
1909	25669
1910	91675
1911	216353
1912	414371
1913	638058
1914	927751
1915	1261448
1916	1675819
1917	2203867
1918	2973937
1919	3622996
1920	4492075
1921	5493166
1922	6475922
1923	7686032
1924	9343516
1925	11290693
1926	13252538
1927	15353729
1928	18588023
1929	22185350
1930	25834015
1931	28910628
1932	32166924
1933	36237294
1934	41019062
1935	46112525
1936	51858714
1937	59112040
1938	67458132
1939	76918992
1940	87663302
1941	97571536
1942	108246173
1943	118528441
1944	129309421
1945	140339757
1946	151285752
1947	163298844
1948	175949994
1949	189712245
1950	192066459
1951	194582021
1952	197379942
1953	200317209
1954	203155467
1955	205880048
1956	208762310
1957	211329210
1958	214809193
1959	217904141
1960	220485709
1961	225087794
1962	232326452
1963	233635571
1964	237430916
1965	242627055
1966	246682757
1967	251321512
1968	255362546
1969	259267901
1970	268266719
1971	276370789
1972	284614205
1973	294012726
1974	304063973
1975	313686181
1976	329611962
1977	345787099
1978	361115159
1979	377840346
1980	394778219
1981	412038788
1982	430465463
1983	446768945
1984	464304539
1985	485059759
1986	502445006
1987	519965932
1988	535833041
1989	551975175
1990	569001056
1991	586015936
1992	605168677
1993	623140644
1994	640580896
1995	657603110
1996	678193315
1997	696586987
1998	715710392
1999	738255108
2000	762094275
2001	788449004
2002	817069939
2003	849057180
2004	882489219
2005	920640687
2006	963317233
2007	1008791700
2008	1053177068
2009	1098072149
2010	1146007173
2011	1192941106
2012	1238360568
2013	1284902132
2014	1331176005