how much uterus left after subtotal?

Does anyone know exactly how much uterus is generally left after a subtotal hysterectomy?
I know it involves leaving the cervix but I was wondering if a small amount of uterus is also left. I cant seem to find anywhere to find this info.

Actually, the cervix is part of the uterus. They are not seperate organs. Sometimes a little of the uterine tissue gets left behind, but never on purpose, as far as I know. If it does happen, you can end up having what is called a mini-period each month, if you still have your ovaries.