When I was taking exams I was told that the grades would show that you were in the top 5%, 10%, whatever, of the country in that subject, and that you would usually have to get 70%, 60%, whatever, to acheive that. Which is why I don't understand all of this. Surely it just means that to be in the top 5% you have to get a higher mark? Whether the exams are getting easier, the teaching is getting more exam orientated or the students are getting brighter doesn't matter. You just have to get a higher mark to be in the top band.