Not a number, just as such, but some indication of why you think that's the number. How one conceptualizes what it means for the church to be responsible is crucial if you're going to take a harsh line.
It's certainly true that some Popes, Archbishops, Bishops, and Priests have done some really nasty things. But it's also true that the church has had some voices of profound ethical sensitivity. In my view, it seems very difficult to say there is, at any one time, a will of the church--and if that's true, it's hard to blame the church for any act of commission, which necessarily involves will.
The church can be blamed, I think, for omissions, and many of those are pretty bad. It ommitted to investigate clergy who were abusing and molesting children, and arguably continues to omit to do so. We might say that the church can be blamed for creating an atmosphere that condoned horrific atrocities--but then, what should we say about those within the church who fought against such atrocities? In short, I'm not apologist for the church, but I caution against going overboard. A careful argument for why the church should be thought responsible for whatever crimes of which they may be accused.
