| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.95/5 | 4.40/5 |
| Vol 2 | 2.66/5 | 4.17/5 |
| Vol 3 | 2.79/5 | 4.25/5 |
| Vol 4 | 2.76/5 | 4.35/5 |
| Vol 5 | 2.67/5 | 4.03/5 |
| Vol 6 | 2.73/5 | 4.23/5 |
| Vol 7 | 2.71/5 | 4.09/5 |
| Vol 8 | 2.77/5 | 4.29/5 |
| Vol 9 | 2.73/5 | 4.17/5 |
| Vol 10 | 2.92/5 | 4.40/5 |
| Vol 11 | 2.84/5 | 4.36/5 |
| Vol 12 | 2.77/5 | 4.35/5 |
| Vol 13 | 2.93/5 | 4.45/5 |
| Vol 14 | 2.67/5 | 4.09/5 |
| Vol 15 | 2.87/5 | 4.38/5 |
| Vol 16 | 3.20/5 | 4.49/5 |
| Vol 17 | 2.69/5 | 4.25/5 |
| Vol 18 | 2.82/5 | 4.38/5 |
| Vol 19 | 2.91/5 | 4.23/5 |
| Vol 20 | 2.85/5 | 4.42/5 |
| Vol 21 | 2.22/5 | 3.30/5 |
| Vol 22 | 1.69/5 | 3.28/5 |
| Overall | 2.73/5 | 4.49/5 |