Jury Verdict Research reports on a study it conducted that found that in the last ten years, the overall median compensatory award for soft tissue knee injuries, strains, and cartilage and ligament damage is $40,972.
The average trial value of knee injury cases involving knee lacerations, contusions, and inflammation is $57,884 ($8,952 median). The average verdict for a knee strain case is $70,055 ($10,412 median). The average verdict for a chondromalacia knee injury (abnormal softening of the knee cartilage on the underside of the patella) is $215,434 (median is $45,000).
I think these numbers are a bit low, but they are of interest to lawyers trying to determine how much is the settlement value of their knee injury case.