Year	Millions Of Dollars
1919	14014.0
1920	18104.0
1921	19942.0
1922	19818.0
1923	22090.0
1924	25219.0
1925	22580.0
1926	25657.0
1927	25923.0
1928	27086.0
1929	27847.0
1930	30337.0
1931	25115.0
1932	19519.0
1933	18217.0
1934	20677.0
1935	18263.0
1936	19306.0
1937	23474.0
1938	25476.0
1939	25900.0
1940	27100.0
1941	28600.0
1942	30800.0
1943	32400.0