Year	Millions Of Dollars
1919	37139.0
1920	43890.0
1921	35536.0
1922	37003.0
1923	43339.0
1924	43323.0
1925	45019.0
1926	48017.0
1927	48433.0
1928	49361.0
1929	52214.0
1930	47767.0
1931	40468.0
1932	31699.0
1933	30054.0
1934	34891.0
1935	37937.0
1936	42783.0
1937	47524.0
1938	44351.0