Year	Millions Of Dollars
1916	373.000
1917	1481.00
1918	1054.00
1919	1448.00
1920	911.000
1921	572.000
1922	1014.00
1923	1198.00
1924	1099.00
1925	1254.00
1926	1166.00
1927	1157.00
1928	1247.00
1929	1149.00
1930	651.000
1931	460.000
1932	235.000
1933	436.000
1934	670.000
1935	767.000
1936	1062.00
1937	978.000
1938	680.000
1939	1086.00
1940	1229.00