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The QS World University Rankings are annual university rankings published by Quacquarelli Symonds (QS) which provides overall rankings as well as ranking for individual subjects. The below chart compares the different countries based on the number of universities they have in the top 100 World University Rankings of 2013/14. Just like any normal pie-chart, angles reflect the number of universities per country, while segments radii reflect the average score per country in the "citations per faculty" criterion. We want to see from this chart the countries driving the world's innovation by showing those with more top-ranked universities besides a high number of published research.
The full list was published by the Guardia here, with detailed scores for each university.