Official figure of German fighter losses attributed to enemy action on the Eastern Front in 1944: 972.
Here are the official loss figures for the VVS KA in 1944:
http://my.tele2.ee/airacesww2/airace...losses1944.htm
Although I haven't arrived there yet in my research, I feel there is reason to doubt the German loss figure. It appears to be a bit low. The incomplete Generalquartiermeister loss records for 1944 list 529 Bf 109s for JG 52 alone (1944 only). Of course this number includes aircraft with damage degrees above 10 %, and due to all reasons, it must also be kept in mind that it is far from complete.
I think that we'll see one day. . .
All best,
Christer Bergström