Year	Millions Of Dollars
1920	1666.90
1921	1377.40
1922	1379.60
1923	1437.30
1924	1472.80
1925	1595.00
1926	1658.20
1927	1403.30
1928	1529.90
1929	1675.70
1930	1453.90
1931	1180.80
1932	987.300
1933	962.500
1934	947.800
1935	1093.20
1936	1266.70
1937	1282.20
1938	1223.80
1939	1297.90
1940	1511.00
1941	2097.80
1942	3168.20
1943	3241.60
1944	3221.50
1945	2536.80