1 in 45 years. If there are so few of these that we can't get concrete evidence that they exist, then there aren't enough of them to reproduce without inbreeding being a problem.
Unless they are way smarter than humans, they don't exist.
interbreeding is a problem and has shown its face in deformed tracks and aggressive/violent encounters in the eastern part of texas. no doubt they arew highly intelligent. they will only be seen if they want to be. the film from 1967 is the best to date. sure others have been caught on film but no other piece of footage gives the details of the creature like the pgf does. it shows muscle movement under the skin, a contusion on her right thigh, the pads on her feet etc.