HWD,
The figures I quote are a rough average, and based on nothing more than observation of the UK airline industry over the last 7-8 years.
The past year has been a little exceptional, I guess, where airlines are trying to make up the lost ground when they did little or no recruiting post 11/09/01.
My totally unscientific and unverified numbers are probably not going to be too far off the mark. Maybe with some more knowledge and inside info could put me straight?