Since 2012, the removal of the cap on numbers has changed the landscape so completely that what happened in the past can genuinely be of no use in predicting the future. Now that universities have (as of this year) no limits on how many students they can take, the calculations of how many they actually will take have entered a whole new area of unpredictability. The guide posted above is useful in as far as it shows what the clearing guide looks like so you know what to expect, but it won't be an accurate guide to this year in any way. Think of it like this: if a shop has lots of lime green jumpers with three arms left over after the season then they will put them in the sales in July to see if they can get rid of them. They may or may not manage to do so. It would be a stupid shop which then restocked with the same number of the same jumpers again for the following year, knowing they will be stuck with the same leftovers. It's like this with university courses. If they have a lot of courses in clearing, then they will readjust the numbers of offers they make in the following year to resolve the problem, and therefore what is in clearing one year is likely to be very different to the next year. Hope that makes (albeit very over-simplified) sense.