I strongly oppose doing statistics as that is not my approach at all. But the technocratic non-keeper rate was certainly less than 10% on all shots excluding my tries on panning. Panning I was so bad, I got only about 1 out of 12 in the quality I wanted. But that really has nothing to do with the equipment. That is purely my incapability that needs a lot more practise.
My personal aim is to get somewhere between 10 and 30 "keepers" out of any photographic activity. Neither me nor my friends and family are interested in watching slideshows of dozens or hundreds of images flying past at 1 pic/second.
When I was a child I had to endure "slideshow evenings" of my family. Not enjoyable.
The above target number range is regardless of the event being a 14 day vacation or a half day trip. It's also regardless of my having shot 40 shots or 3,000 originally. I want a dozen or two nice images, no more, and I am happy. One good roll of film, so to say.