Where on the internet (not books) may I find Luftwaffe aircraft losses (by type and theatre) in World War 2?

Answer 1

Germany flew about 150,000 sorties in WW II. About 1 of 17 were shot down by either side. So there were 8000 - 9000 kills.
http://www.angelfire.com/ct/ww2europe/stats.html

Germany's aircraft losses are still debated, largely owing to the Luftwaffe quartermasters' method of reporting. Aircraft damage was reported in increments up to 100 percent; those missing in action were counted as 100 percent. On a typical day, two thirds of Luftwaffe casualties might be total losses and one fifth reported between 50- to 95-percent damage and the rest less than 50 percent damaged. Under this system, what constituted a loss? A 50-percent-damaged plane might be salvageable at the depot level, but it certainly would not fly again for months. And how long would it take to repair a 25-percent-damaged plane? Whatever the criteria, Germany's reported Luftwaffe losses in the Battle were approximately 1,700 aircraft. In contrast, the RAF credited more than 2,600 shootdowns to its fighter squadrons-a difference of 52 percent.

Answer 2

Try this, if you scroll down you have the individual files.

http://www.lesbutler.ip3.co.uk/tony/tonywood.htm