Year	Millions Of Long Tons
1911	12.2100
1912	10.6200
1913	12.7600
1914	13.7600
1915	13.5800
1916	10.8400
1917	11.0000
1918	8.57000
1919	13.1000
1920	11.3800
1921	13.8400
1922	10.5200
1923	10.1700
1924	12.4100
1925	10.8000
1926	9.57000
1927	10.1000
1928	9.19000
1929	7.07000
1930	10.3800
1931	13.0600
1932	17.6000
1933	10.9500
1934	10.3400
1935	7.79000
1936	5.44000
1937	5.53000
1938	7.61000
1939	4.75000
1940	3.61000
1941	3.59000
1942	3.37000
1943	5.17000
1944	4.14000
1945	4.43000
1946	5.34000