Year	Billions Of Dollars
1919	2.46000
1920	3.22000
1921	2.27000
1922	2.12000
1923	2.47000
1924	2.29000
1925	2.33000
1926	2.40000
1927	2.35000
1928	2.26000
1929	2.33000
1930	2.00000
1931	1.58000
1932	1.12000
1933	1.06000
1934	1.16000
1935	1.27000
1936	1.47000
1937	1.59000
1938	1.35000