Year	Millions Of Dollars
1919	3966.00
1920	4287.00
1921	4470.00
1922	4896.00
1923	5165.00
1924	5631.00
1925	5465.00
1926	5141.00
1927	5078.00
1928	4941.00
1929	4917.00
1930	4265.00
1931	3026.00
1932	2090.00
1933	2114.00
1934	1905.00
1935	2143.00
1936	2186.00
1937	2579.00
1938	2575.00