An enquiring Journo (or please God, research assistant for the Minister of Transport) should also ask "What's the recruitment/selection timeframe?" - In my case 12 years ago, 4 stage selection took 1 year!
Then they should ask "What's the duration of the college simulator training?" [again, about 1 year]
Then they should ask "What's the average age of your controllers? How many will retire in the next two years?"
And that's before they even try and ascertain how many are thinking about going overseas.......
Love that quote from AsA spokesman something along the lines of "yes, there is a staff shortage. No, it is not due to mismanagement" - Well, who's fault is it?