Year	Billions Of Dollars
1919	7.98000
1920	7.45000
1921	2.56000
1922	4.12000
1923	8.40000
1924	5.64000
1925	9.09000
1926	9.00000
1927	8.23000
1928	7.67000
1929	10.4900
1930	4.20000
1931	0.160000
1932	-5.68000
1933	-5.18000
1934	-4.22000
1935	0.330000
1936	4.27000
1937	5.01000
1938	1.04000
1939	5.18000