Year	Millions Of Dollars
1915	3136.00
1916	4676.00
1917	6034.00
1918	7932.00
1919	8217.00
1920	8181.00
1921	5497.00
1922	5642.00
1923	7362.00
1924	6761.00
1925	8362.00
1926	9541.00
1927	9696.00
1928	9677.00
1929	11302.0
1930	9589.00
1931	7213.00
1932	5602.00
1933	5089.00
1934	6554.00
1935	7684.00
1936	9177.00
1937	10955.0
1938	8641.00
1939	8989.00
1940	10240.0
1941	13813.0
1942	16693.0
1943	20809.0