| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1AB | 576 |
5.6%
|
| 2 | 1C | 1789 |
17.4%
|
| 3 | Grade 2 | 4178 |
40.7%
|
| 4 | Grade 3 | 3547 |
34.6%
|
| 9 | 170 |
1.7%
|