| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.87/5 | 4.68/5 |
| Vol 3-4 | 3.24/5 | 4.63/5 |
| Vol 5-6 | 3.71/5 | 4.65/5 |
| Vol 7-8 | 3.85/5 | 4.69/5 |
| Vol 9-10 | 3.84/5 | 4.68/5 |
| Vol 11-12 | 3.02/5 | 4.52/5 |
| Vol 13-14 | 2.99/5 | 4.57/5 |
| Vol 15-16 | 3.15/5 | 4.60/5 |
| Vol 17-18 | 3.44/5 | 4.59/5 |
| Vol 19-20 | 3.07/5 | 4.56/5 |
| Vol 21-22 | 2.93/5 | 4.47/5 |
| Vol 23-24 | 3.00/5 | 4.53/5 |
| Vol 25-26 | 3.24/5 | 4.60/5 |
| Vol 27-28 | 3.38/5 | 4.65/5 |
| Vol 29-30 | 3.36/5 | 4.62/5 |
| Vol 31-32 | 3.77/5 | 4.68/5 |
| Vol 33-34 | 3.90/5 | 4.72/5 |
| Vol 35-36 | 3.77/5 | 4.68/5 |
| Vol 37-38 | 3.68/5 | 4.69/5 |
| Vol 39-40 | 3.15/5 | 4.62/5 |
| Vol 41-42 | 3.81/5 | 4.67/5 |
| Vol 43-44 | 3.80/5 | 4.66/5 |
| Vol 45-46 | 3.79/5 | 4.67/5 |
| Vol 47-48 | 3.24/5 | 4.57/5 |
| Overall | 3.46/5 | 4.72/5 |