Shakeshaft is a vatican favorite with suspect "statistics" like that.
When the LA public school district pays out one billion dollars to redress sexual abuse claims, you can start discussing parity.
And it shouldn't surprise anyone another difference is that cases are criminally prosecuted all the time in public schools while it is the usual policy for Rome to insist on anonymity and no criminal trials for its pederast priests.
People who continue to ignore the forest for the trees risk a forest fire.
And D.E., Shakeshaft is an internationally-recognized researcher affiliated with Virginia Commonwealth University and Hofstra University, with almost 30 years of experience. She has no connections with the Catholic Church. If you have any actual links to sources disputing Shakeshaft's research, let's see them. Otherwise, your reflexive dismissal of her findings does not reflect well on your objectivity.
Here I must end my comments, because this is really the limit of my knowledge of the subject.
You may count on my support for "Equal Justice." Amen.