That actual number is expected to be a lot higher. The number you're talking about is people that had issues and were diagnosed with it, the associated ICD9 is

That actual number is expected to be a lot higher. The number you're talking about is people that had issues and were diagnosed with it, the associated ICD9 is usually what is used in those statistics. Not too mention a significant number of normal doctors and older orthopedic surgeons never test for it, nor know how to test even though the test itself is very simple. Basically, a lot of intense sports, especially contact sports trigger the pain associated with it. But if you don't do those you'll never have symptoms, which is why the medical decision is mostly divided into two camps. One of them thinks it's a genetic condition that always needs to be corrected or addressed and the other believes that most of people have it without ever exhibiting symptoms because, as I said earlier, their usage pattern never triggers any symptom.