Year	Millions Of Long Tons
1911	40.9900
1912	57.0400
1913	59.4300
1914	40.0300
1915	55.4200
1916	78.1500
1917	76.1500
1918	72.8400
1919	56.5800
1920	70.0200
1921	26.6700
1922	51.1500
1923	71.1300
1924	52.8700
1925	65.2500
1926	70.3600
1927	62.5400
1928	64.5200
1929	76.6600
1930	55.9200
1931	28.7600
1932	5.34000
1933	24.8000
1934	25.9900
1935	33.9400
1936	52.3200
1937	73.5300