P.S. The table first appeared in the "Bible" of VVS history called "Sovetskaya aviatsiya v Velikoy Otechestvennoy voine v tsifrakh" (Soviet aviation in the Great Patriotic War, in figures). It was published in the early 1960s as a classified document and as far as I know, has never been issued again. There are just scanned/OCRed copies on the Internet.