| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.61/5 | 3.64/5 |
| Vol 2 | 2.91/5 | 4.01/5 |
| Vol 3 | 3.02/5 | 4.05/5 |
| Vol 4 | 2.73/5 | 3.99/5 |
| Vol 5 | 2.60/5 | 3.75/5 |
| Vol 6 | 2.98/5 | 3.85/5 |
| Vol 7 | 3.31/5 | 4.29/5 |
| Vol 8 | 3.28/5 | 4.27/5 |
| Vol 9 | 2.63/5 | 3.79/5 |
| Vol 10 | 2.97/5 | 4.09/5 |
| Vol 11 | 2.69/5 | 3.77/5 |
| Vol 12 | 3.06/5 | 3.96/5 |
| Vol 13 | 3.09/5 | 4.09/5 |
| Vol 14 | 3.04/5 | 4.06/5 |
| Vol 15 | 3.06/5 | 4.03/5 |
| Vol 16 | 3.12/5 | 3.91/5 |
| Overall | 2.94/5 | 4.29/5 |