| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.71/5 | 3.86/5 |
| Vol 2 | 2.68/5 | 3.71/5 |
| Vol 3 | 2.40/5 | 3.40/5 |
| Vol 4 | 2.70/5 | 3.73/5 |
| Vol 5 | 2.66/5 | 3.78/5 |
| Vol 6 | 2.58/5 | 3.59/5 |
| Vol 7 | 2.69/5 | 3.73/5 |
| Vol 8 | 2.87/5 | 3.72/5 |
| Vol 9 | 2.73/5 | 3.89/5 |
| Vol 10 | 2.88/5 | 3.78/5 |
| Vol 11 | 2.95/5 | 3.81/5 |
| Vol 12 | 2.63/5 | 3.69/5 |
| Overall | 2.71/5 | 3.89/5 |