Year	Millions Of Dollars
1918	10684.0
1919	13385.0
1920	13681.0
1921	11005.0
1922	11474.0
1923	12603.0
1924	12528.0
1925	12989.0
1926	12926.0
1927	12612.0
1928	12867.0
1929	13229.0
1930	11021.0
1931	9043.00
1932	7151.00
1933	7584.00
1934	7924.00
1935	8244.00
1936	8892.00
1937	9438.00
1938	8782.00