X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X
                                         X  X
                                         X  X
           ------------------------------------
           0  1  2  3  4  5  6  7  8  9  10 11

      The histogram shows the distribution of grades.

Two exceptionally good projects earned 11, i.e. 10 + 1 bonus.