Year	Millions Of Dollars
1919	24438.0
1920	26931.0
1921	21751.0
1922	21059.0
1923	22676.0
1924	23442.0
1925	25004.0
1926	26608.0
1927	26276.0
1928	26869.0
1929	28025.0
1930	25938.0
1931	21162.0
1932	17778.0
1933	17828.0
1934	20700.0
1935	22800.0
1936	25300.0
1937	27200.0
1938	25700.0
1939	26600.0
1940	28200.0
1941	32600.0
1942	38900.0
1943	44300.0