MZ,you should have first checked the sources before writing such inflated numbers.
Even by German most optimistic claims,you are getting well over 5000 planes shoot down in single year.
Generally quoted figures say 1 Il-2 lost for each 26 missions flown in 1943 for example,while overall statistics for entire was 1 plane loss each 53 missions.Ratio of shoot down and constructed planes is roughly 1:3,however most of them were not permanent losses (generally I read 7-8 out of 10 planes could be repaired,given the relatively low speed and altitude on which they were flown crash was not always catastrophic..and yeah I know,wow).
To give you the idea,statistic include first two years of combat.It was not safest plane to fly,but given the condition in which it operated,it performed fairly good.
