I'm glad to see you have corrected your argument from it's previously incorrect position.
They don't define "unwanted sexual contact." For example, Bora Zivkovic had a habit of hugging women, some of whom didn't enjoy it. That is literally an "unwanted sexual contact." It may be creepy, unpleasant or inappropriate, and it should (and did) stop. But it's not rape.
This study is about unwanted sexual contact, not rape. If you don't know what unwanted sexual contact means, take a course. Hint, pressing your body up against an unwilling partner is unwanted sexual contact.
This study doesn't distinguish between unwanted hugging and forcible rape, and it doesn't break down the 26% figure into more or less violent forms of unwanted sexual contact. It doesn't even give the number of violent rapes.
Aww, does it not discuss legitimate rape? It's a study about sexual assault.
If you have an unknown number of unwanted huggings, at one end of the spectrum, and an unknown number of violent rapes, at the other end of the spectrum, then that's a big grey area.
Not if you are looking at rates of sexual assault. In which case, it's exactly what you were looking for.
I'd like to see a better-quality study.
You're free to fund one, or if you think you can do better - perform it yourself.