| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.45/5 | 3.42/5 |
| Vol 2 | 2.49/5 | 3.41/5 |
| Vol 3 | 2.61/5 | 3.62/5 |
| Vol 4 | 2.71/5 | 3.78/5 |
| Vol 5 | 2.59/5 | 3.66/5 |
| Vol 6 | 2.65/5 | 3.80/5 |
| Vol 7 | 2.56/5 | 3.60/5 |
| Vol 8 | 2.80/5 | 3.83/5 |
| Vol 9 | 2.55/5 | 3.68/5 |
| Vol 10 | 2.70/5 | 3.82/5 |
| Vol 11 | 2.59/5 | 3.58/5 |
| Vol 12 | 2.74/5 | 4.00/5 |
| Vol 13 | 2.73/5 | 4.02/5 |
| Vol 14 | 2.67/5 | 3.82/5 |
| Overall | 2.63/5 | 4.02/5 |