Year	Millions Of Dollars
1916	77000.0
1917	60145.0
1918	98779.0
1919	84109.0
1920	150505.
1921	323369.
1922	196480.
1923	125650.
1924	13753.0
1925	134745.
1926	120174.
1927	197472.
1928	173170.
1929	190692.
1930	333528.
1931	605249.
1932	839051.
1933	743116.
1934	642896.
1935	572047.
1936	382567.
1937	444825.
1938	566585.
1939	377274.
1940	295585.