There is a source on the net, compiled by Les Butler, on Luftwaffe Aircraft Losses By Theatre, September 1943 - October 1944:
http://www.lesbutler.ip3.co.uk/jg26/thtrlosses.htm
For those of you who are not aware of it, it's worth taking a look at it.
I would highlight one conclusion:
An airplane flying a combat mission in the West was 7.66 times more likely to be destroyed than one on a similar mission in the East. It is clear that the burden of sacrifice was borne by the Luftwaffe aircrew on the Western Front and over the Reich, not on the Eastern Front.
Dénes