There is absolutely no accurate way to answer your question. Even if there were an accurate statistical answer readily available, you could easily fall into the 20% outlying values higher/lower. The non-contextual answer would have no actual relevance to your specific case.
GET AN ATTORNEY...
We offer general concepts, but you should give ALL your facts to a licensed Attorney in your state before you RELY upon any legal advice.
I agree with Mr. Corson. There is no way for us to tell you. Here in my state that case could be worth a figure within a very broad range depending on all the facts. Get yourself the best work comp lawyer you can find. You can start your search here on AVVO for a local work comp lawyer.
This answer is intended as general information and not as specific legal advice. If you want to have a free consultation with me, please contact me through AVVO.