Year	Millions Of Dollars
1915	2981.00
1916	4546.00
1917	5678.00
1918	7398.00
1919	7446.00
1920	7496.00
1921	5243.00
1922	5355.00
1923	6926.00
1924	6592.00
1925	8113.00
1926	9190.00
1927	9242.00
1928	9472.00
1929	10401.0
1930	9115.00
1931	7006.00
1932	5155.00
1933	4983.00
1934	6270.00
1935	7380.00
1936	8838.00
1937	10291.0
1938	8225.00
1939	8887.00
1940	10021.0
1941	13426.0
1942	16001.0
1943	20338.0