A bar graph, each bar representing a range of scores from the test. The A+ (0-16) bar is by far the tallest, at over 100 characters; 1A- (17-22) has almost 40, and all the rest fall between 20 and about 30. The lowest (A-; less than 0) is just below 20.
The exact scores are: 19 characters at A!, 108 at A+, 39 at A-, 29 at B, 21 at C, 32 at D, and 30 at F.