What sport causes the most injuries?

Football sees 12 times more injuries than the next sport in line, basketball. The main inuries are knee related too. I take you back to the acl statistic, 1 in every 3500 people have torn their acl. These two sports contribute to that statistic in a great majority. Also, sprains in the knees are also very painful and can take weeks to heal. Knees were not built to withstand the force that football players exert on the joint.