| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.02/5 | 4.40/5 |
| Vol 2 | 2.87/5 | 4.17/5 |
| Vol 3 | 3.00/5 | 4.36/5 |
| Vol 4 | 3.14/5 | 4.36/5 |
| Vol 5 | 2.97/5 | 4.32/5 |
| Vol 6 | 2.68/5 | 3.97/5 |
| Vol 7 | 2.87/5 | 4.28/5 |
| Vol 8 | 2.83/5 | 4.30/5 |
| Vol 9 | 2.78/5 | 4.25/5 |
| Vol 10 | 2.69/5 | 3.88/5 |
| Vol 11 | 2.69/5 | 3.98/5 |
| Vol 12 | 2.89/5 | 4.36/5 |
| Vol 13 | 2.86/5 | 4.20/5 |
| Vol 14 | 2.75/5 | 4.34/5 |
| Vol 15 | 2.76/5 | 4.23/5 |
| Vol 16 | 2.82/5 | 4.17/5 |
| Vol 17 | 2.79/5 | 4.28/5 |
| Vol 18 | 2.91/5 | 4.30/5 |
| Overall | 2.86/5 | 4.40/5 |