Do you really mean the percentage who passed, or the percentage who were offered a grammar place or the percentage to took up a grammar place? There's likely to be quite a difference.
I mean the percentage who passed (or won a selection appeal). For Bucks state school pupils, there is little difference between those who passed and those who took up grammar school places. I also suspect (but don't know for sure) that Bucks prep school passers mainly take up their places.
The Out of County people are very different. An awful lot of them do not/cannot take up places.
does anyone know what percentage of state secondary places in Bucks are in grammars and what percentage are in uppers?
In 2006, there were 3718 upper school places and 2105 grammar school places to be filled.........if that's what you meant(?)