When I was down at nursling doing stage 4 a guy was telling someone they had 3000 applicants last year, 144 made it through to stage 4 and 100 through to new zealand, going by that its like 3% but they did say they are starting to take more, plus theyve got the icp course as well now...
Ive no idea how reliable that information is, just what I overheard whilst I was there, im just happy to have made it through to be honest lol