Many writer credits courtesy of Martin O'Hearn. Information on National (DC) Comics' annual sales of Superman from mid-1945s to the mid-1947s is taken from site Circulating American Magazines: Visualization tools for U.S. Magazine History.
CIRCULATION DATA
1945 (Last 6 months) - 4,915,833
1946 - 9,181,458
1947 (First 6 months) - 4,277,151
1945
July/August - 1,515,417
September/October - 1,687,639
November/December - 1,712,777
1946
January/February - 1,847,276
March/April - 1,780,423
May/June - 1,388,809
July/August - 1,316,187
September/October - 1,417,201
November/December - 1,431,562
1947
January/February - 1,405,223
March/April - 1,472,872
May/June - 1,399,056