'According to the National Crime Records Bureau, 24,206 rape cases were reported in India in 2011, but experts agree that the number of unreported cases of sexual assault brings the total much higher.[9]
The latest estimates suggest that a new case of rape is reported every 22 minutes in India.[10]' (WIKI)
But it does not answer my question about non reported rape.. only the number 'reported'
If you think that crimes like rapes are not under reported in the western world, then you are mistaken. Its the stigma thats attached to rape which prevents the victimes from reporting it. The stigma is more or less the same, both developed and developing world.
According to this report, between 70-90% of the rapes go unreported in the UK and 94% of those reported don't end in a conviction!
Between 70-90% rapes thought to go unreported …and 94% of reported cases don’t end in a conviction - University of Surrey - Guildford
Its the same in every other country of the world, be it developed or developing.