I was thinking along those lines, but wasn't sure, T. I am under the impression that terrorists are trending toward fewer 'incidents', but more deaths per incident.
I found something:
It's on
this page, which is apparently where the other graphs came from. Pretty picture, but I wish they would publish a table of numbers.
What kind of casualties specifically?
They don't say. Some of the other graphs call out deaths vs. injuries. I don't think that website's information is very user friendly.