Cat shield for Prius C at all necessary?

Hello,
I apologize in advance for asking a question that likely is somewhere here on the forums. I honestly tried to search hard. But due to the keywords I can't find specific answers to my question, which is:

How common are catalytic converter thefts on Prius C models?

I live in San Francisco, and have a 2013 and was considering installing a theft preventions cover / shield, but there doesn't seem to be instances I have seen of Prius C cat thefts. Searching, even using quotes (i.e. "Prius C") still doesn't yield satisfying results.

I know it would still be mostly likely worth paying the small price, but I just want to know or see evidence that any C cat thefts have happened at all. If there are links please provide them.

Many thanks

 

Thanks Dig4Dirt.