Year	Millions Of Dollars
1916	4093.00
1917	5736.00
1918	4691.00
1919	5219.00
1920	4116.00
1921	1778.00
1922	3454.00
1923	4272.00
1924	3596.00
1925	4383.00
1926	4495.00
1927	3939.00
1928	4744.00
1929	5216.00
1930	2758.00
1931	1465.00
1932	758.000
1933	1461.00
1934	1906.00
1935	2483.00
1936	3540.00
1937	3622.00
1938	2163.00
1939	3599.00
1940	5278.00