Circulation figures, are the amount of something (for example the amount of copies made of something) that are being distributed per day/week or month, they are a good example of measurable data. The highest circulation figures for reading material are newspapers. Circulation is one of the main factors that is used to set rates for advertising. Circulation is not always the same as the copies sold, since some newspapers are sold without cost to the reader. Readership figures are usually higher than circulation figures because the typical one copy of a newspaper is read by more than one person. These figures are used for seeing the most and least popular news papers in a certain area, then the media producers can determine the reason why this newspaper did better than the other, for example in the table below a media producer could determine why the sun has done better than the daily mail since 2010.
