| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.12/5 | 3.27/5 |
| Vol 2 | 1.88/5 | 2.95/5 |
| Vol 3 | 1.80/5 | 2.81/5 |
| Vol 4 | 1.67/5 | 2.76/5 |
| Vol 5 | 1.92/5 | 3.13/5 |
| Vol 6 | 1.88/5 | 3.60/5 |
| Vol 7 | 1.78/5 | 2.81/5 |
| Vol 8 | 1.75/5 | 2.77/5 |
| Vol 9 | 1.93/5 | 3.57/5 |
| Vol 10 | 1.55/5 | 2.48/5 |
| Vol 11 | 1.89/5 | 3.43/5 |
| Vol 12 | 1.67/5 | 2.67/5 |
| Vol 13 | 1.91/5 | 2.98/5 |
| Vol 14 | 1.49/5 | 2.63/5 |
| Vol 15 | 1.43/5 | 2.80/5 |
| Overall | 1.78/5 | 3.60/5 |