Year	Thousands Of Short Tons
1918	1566.00
1919	1111.00
1920	1100.00
1921	457.000
1922	1199.00
1923	1165.00
1924	1190.00
1925	1809.00
1926	999.000
1927	1196.00
1928	997.000
1929	1535.00
1930	1758.00
1931	976.000
1932	1199.00
1933	1081.00
1934	1426.00
1935	1700.00
1936	1988.00
1937	1926.00
1938	1743.00
1939	2000.00
1940	2276.00
1941	2802.00
1942	3167.00
1943	2661.00
1944	3170.00
1945	2689.00
1946	3394.00
1947	3243.00
1948	2914.00
1949	2519.00
1950	2734.00
1951	4585.00