| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.49/5 | 3.98/5 |
| Vol 2 | 3.46/5 | 3.93/5 |
| Vol 3 | 3.47/5 | 3.85/5 |
| Vol 4 | 3.42/5 | 3.86/5 |
| Vol 5 | 3.52/5 | 4.14/5 |
| Vol 6 | 3.48/5 | 3.99/5 |
| Vol 7 | 3.44/5 | 3.95/5 |
| Vol 8 | 3.41/5 | 3.91/5 |
| Vol 9 | 3.40/5 | 3.88/5 |
| Vol 10 | 3.37/5 | 3.92/5 |
| Vol 11 | 3.39/5 | 3.92/5 |
| Vol 12 | 3.45/5 | 3.98/5 |
| Vol 13 | 3.40/5 | 4.00/5 |
| Vol 14 | 3.31/5 | 3.94/5 |
| Vol 15 | 3.46/5 | 3.85/5 |
| Overall | 3.43/5 | 4.14/5 |