Year	Millions Of Dollars
1916	656.900
1917	629.600
1918	689.800
1919	995.500
1920	2029.40
1921	3878.20
1922	2193.80
1923	2013.60
1924	2223.90
1925	1962.60
1926	2168.70
1927	2471.70
1928	2391.10
1929	2914.10
1930	4877.60
1931	6970.90
1932	7796.70
1933	5533.30
1934	4181.00
1935	3468.80
1936	2360.60
1937	2504.10
1938	3067.80
1939	2274.60
1940	2524.10