(a) Where an action is brought against more than one person for injury to person or property and the plaintiff is himself to some degree responsible for the injury or damages claimed, the trier of fact, in its determination of the total amount of damages to be awarded, if any, may apportion its award of damages among the persons who are liable and whose degree of fault is greater than that of the injured party according to the degree of fault of each person. Damages, if apportioned by the trier of fact as provided in this Code section, shall be the liability of each person against whom they are awarded, shall not be a joint liability among the persons liable, and shall not be subject to any right of contribution.

(b) Subsection (a) of this Code section shall not affect venue provisions regarding joint actions.

(c) This Code section shall apply only to causes of action arising on or after July 1, 1987.