One potentially useful context would be how this compares to other religions. A quick internet search tells me there are about 1.5 billion Muslims in the world

One potentially useful context would be how this compares to other religions. A quick internet search tells me there are about 1.5 billion Muslims in the world and about 2.19 billion Christians. If we consider the amount of media attention the various catholic churches have been receiving it isn't difficult to believe the number of "negative" stories could be much higher than ~3000 per year. Does anyone know if this comparison has been done?