0 +
    |
    |
    |
    |
  5 +
    |
    |
    |
    |
 10 +*
    |
    |*
    |
    |
 15 +
    |
    |
    |*
    |***
 20 +
    |*
    |
    |**
    |
 25 +*
    |**
    |*
    |***
    |*
 30 +***
    |
    |**
    |**
    |
 35 +**
    |
    |
    |
    |
 40 +
    |
    |*
    |
    |
 45 +
    |
    |
    |
    |
 50 +
    +---------+---------+---------+---------+---------+
NUMBER OF SCORES: 27, MEAN: 26.407408 +/- 7.098562