| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-3 | 3.44/5 | 4.58/5 |
| Vol 4-6 | 3.49/5 | 4.58/5 |
| Vol 7-9 | 3.36/5 | 4.57/5 |
| Vol 10-12 | 3.74/5 | 4.62/5 |
| Vol 13-15 | 3.75/5 | 4.62/5 |
| Vol 16-18 | 3.90/5 | 4.65/5 |
| Vol 19-21 | 3.76/5 | 4.63/5 |
| Vol 22-24 | 3.85/5 | 4.61/5 |
| Vol 25-27 | 3.95/5 | 4.70/5 |
| Vol 28-30 | 3.86/5 | 4.62/5 |
| Vol 31-33 | 3.92/5 | 4.65/5 |
| Vol 34-36 | 3.87/5 | 4.65/5 |
| Vol 37-39 | 4.03/5 | 4.62/5 |
| Vol 40-42 | 3.80/5 | 4.63/5 |
| Vol 43-45 | 3.98/5 | 4.67/5 |
| Vol 46-48 | 3.45/5 | 4.63/5 |
| Vol 49-51 | 3.58/5 | 4.54/5 |
| Vol 52-54 | 3.85/5 | 4.65/5 |
| Vol 55-57 | 4.06/5 | 4.68/5 |
| Vol 58-60 | 4.07/5 | 4.67/5 |
| Vol 61-63 | 4.18/5 | 4.69/5 |
| Vol 64-66 | 4.18/5 | 4.70/5 |
| Vol 67-69 | 4.17/5 | 4.71/5 |
| Vol 70-72 | 4.14/5 | 4.67/5 |
| Vol 73-74 | 4.18/5 | 4.67/5 |
| Overall | 3.86/5 | 4.71/5 |