Year	Millions Of Dollars
1915	3095.00
1916	4564.00
1917	5943.00
1918	7917.00
1919	8213.00
1920	8180.00
1921	5565.00
1922	5631.00
1923	7313.00
1924	6710.00
1925	8315.00
1926	9510.00
1927	9627.00
1928	9604.00
1929	11340.0
1930	9431.00
1931	7276.00
1932	5475.00
1933	5231.00
1934	6550.00
1935	7557.00
1936	9187.00
1937	11072.0
1938	8320.00
1939	8881.00
1940	9911.00
1941	13778.0
1942	16628.0
1943	20400.0