| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.68/5 | 3.67/5 |
| Vol 2 | 2.63/5 | 3.75/5 |
| Vol 3 | 2.52/5 | 3.82/5 |
| Vol 4 | 2.32/5 | 3.60/5 |
| Vol 5 | 2.64/5 | 3.67/5 |
| Vol 6 | 2.47/5 | 3.55/5 |
| Vol 7 | 2.53/5 | 3.68/5 |
| Vol 8 | 2.50/5 | 3.77/5 |
| Vol 9 | 2.75/5 | 3.98/5 |
| Vol 10 | 2.85/5 | 3.91/5 |
| Vol 11 | 2.72/5 | 3.95/5 |
| Vol 12 | 2.94/5 | 4.17/5 |
| Vol 13 | 2.95/5 | 3.95/5 |
| Vol 14 | 2.64/5 | 3.89/5 |
| Vol 15 | 2.47/5 | 3.67/5 |
| Overall | 2.64/5 | 4.17/5 |