I need the link for that, not that I don’t believe you, I just want the study.
Ask and you shall receive. Good thing you didn't doubt me! Because when I say something here on FR, I mean it!
I said 60% and this source says 59%, I am sure you can excuse the rounding.
“Specifically, when researchers described the man as single, 59 percent of single women were interested in pursuing him. However, when they described the exact same man as being in a committed relationship, 90 percent of the single women were interested.”