Year	Billions Of Dollars
1919	5.45000
1920	5.31000
1921	3.55000
1922	4.18000
1923	5.78000
1924	5.44000
1925	5.96000
1926	6.54000
1927	6.09000
1928	6.50000
1929	7.47000
1930	6.08000
1931	4.12000
1932	2.47000
1933	2.70000
1934	3.40000
1935	4.50000
1936	5.70000
1937	6.60000
1938	4.70000
1939	6.10000