Okay - you actually stated in the neighborhood of thousands ("how many priests have served at any point in this Archdiocese over that span a time? Thousands.").  Now, behold, you revise to 1,000-2,000.
I can live with that - it still means that the archdiocese saw an abuser rate of more than 4%.  What is insignificant about that?
BTW - your math is still off.....(my numbers included religious priests) retirees, etc. you can't get to 10,000 and probably not even 2,000.  You cite 200 parishes - but, in reality, at least 50-100 of these now do not have resident priests - they are mission parishes.  DUH!!!   Anyone who works in the Church knows that.
Here you go - much more data than your wild statements:  http://www.catholic-hierarchy.org/diocese/dsnfe.html
So, fix your assumptions and you will never get to *thousands*