Year	Billions Of Dollars
1919	2.28900
1920	2.98300
1921	2.33800
1922	2.29700
1923	2.59200
1924	2.37200
1925	2.39200
1926	2.48500
1927	2.42300
1928	2.34100
1929	2.41300
1930	2.08200
1931	1.65600
1932	1.21000
1933	1.15600
1934	1.28100
1935	1.36400
1936	1.57500
1937	1.71200
1938	1.45700
1939	1.62900