| Xj | Absolute frequency, fj | Absolute percentage, % |
| 3 to 2.5 | 0 | 0 |
| 2.5 to 2.0 | 5 | 0.0054 |
| 2.0 to 1.5 | 65 | 0.071 |
| 1.5 to 1.0 | 1735 | 1.89 |
| 1.0 to 0.5 | 29,115 | 31.81 |
| 0.5 to 0.0. | 16,757 | 18.3 |
| 0.0 to −0.5 | 21,663 | 23.67 |
| −0.5 to −1.0 | 20,730 | 22.66 |
| −1.0 to −1.5 | 908 | 0.99 |
| −1.5 to −2.0 | 201 | 0.22 |
| −2.0 to −2.5 | 143 | 0.16 |
| −2.5 to −3.0 | 79 | 0.086 |
| −3.0 to −6.0 | 110 | 0.12 |
| DB = 91,519 | 99.98 |