The John Jay report commissioned by the bishops puts the number of priests against whom allegations were made at between 4% and 4.3% for the period from 1950-2002. There is some difficulty in determining the total number of priests active at this time. The total number of victims is 10,667.
usccb.org/nrb/johnjaystudy/index.htm
I think it best to admit that horrible, horrible sins were committed and some bishops contributed to the evil (knowingly, negligently or otherwise) including by not reporting abuse to law enforcement. The Church has always had sinners in its midst (in fact it exists for the redemption of sinners) but it has always acknowledged the sinfulness of sexual abuse. It is taking action to reform itself to prevent the abuse in the future.
As sadly true as it is that some priests abused minors, it is also true that the overwhelming number of priests are faithful, humble, self-sacrificing men of character. There is so much more good in the Church, that the sin there is seems exaggerated. The Catholic Church still safeguards the fulness of the truth of the Gospel in spite of the sinfulness of its members. That it has survived its own mismanagement is a sign of its divine protection.