| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.91/5 | 4.29/5 |
| Vol 2 | 2.76/5 | 4.06/5 |
| Vol 3 | 2.89/5 | 4.25/5 |
| Vol 4 | 3.03/5 | 4.25/5 |
| Vol 5 | 2.86/5 | 4.21/5 |
| Vol 6 | 2.57/5 | 3.86/5 |
| Vol 7 | 2.76/5 | 4.17/5 |
| Vol 8 | 2.72/5 | 4.19/5 |
| Vol 9 | 2.67/5 | 4.14/5 |
| Vol 10 | 2.58/5 | 3.77/5 |
| Vol 11 | 2.58/5 | 3.87/5 |
| Vol 12 | 2.78/5 | 4.25/5 |
| Vol 13 | 2.75/5 | 4.09/5 |
| Vol 14 | 2.64/5 | 4.23/5 |
| Vol 15 | 2.65/5 | 4.12/5 |
| Vol 16 | 2.71/5 | 4.06/5 |
| Vol 17 | 2.68/5 | 4.17/5 |
| Vol 18 | 2.80/5 | 4.19/5 |
| Overall | 2.74/5 | 4.29/5 |