| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.85/5 | 4.59/5 |
| Vol 2 | 2.90/5 | 4.57/5 |
| Vol 3 | 2.76/5 | 4.40/5 |
| Vol 4 | 2.78/5 | 4.30/5 |
| Vol 5 | 2.70/5 | 4.27/5 |
| Vol 6 | 2.69/5 | 4.44/5 |
| Vol 7 | 2.79/5 | 4.53/5 |
| Vol 8 | 2.73/5 | 4.54/5 |
| Vol 9 | 2.77/5 | 4.40/5 |
| Vol 10 | 2.85/5 | 4.69/5 |
| Vol 11 | 2.52/5 | 4.40/5 |
| Vol 12 | 2.80/5 | 4.63/5 |
| Vol 13 | 2.58/5 | 3.93/5 |
| Vol 14 | 2.80/5 | 4.50/5 |
| Vol 15 | 2.83/5 | 4.42/5 |
| Overall | 2.76/5 | 4.69/5 |