Year	Millions Of Dollars
1919	3228.00
1920	3652.00
1921	3872.00
1922	3979.00
1923	4206.00
1924	4374.00
1925	4579.00
1926	4698.00
1927	4935.00
1928	5272.00
1929	5604.00
1930	5720.00
1931	5712.00
1932	5515.00
1933	4999.00
1934	4915.00
1935	4648.00
1936	4608.00
1937	4688.00
1938	4593.00
1939	4630.00