Year	Millions Of Dollars
1915	588.000
1916	752.000
1917	1130.00
1918	1021.00
1919	1519.00
1920	1253.00
1921	1227.00
1922	959.000
1923	1102.00
1924	991.000
1925	1209.00
1926	1565.00
1927	1817.00
1928	1584.00
1929	2492.00
1930	1864.00
1931	1567.00
1932	998.000
1933	835.000
1934	884.000
1935	1072.00
1936	1544.00
1937	1922.00
1938	1319.00
1939	1315.00
1940	1499.00
1941	2157.00
1942	2071.00
1943	2253.00