| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.19/5 | 4.15/5 |
| Vol 2 | 2.94/5 | 4.10/5 |
| Vol 3 | 3.16/5 | 4.22/5 |
| Vol 4 | 3.36/5 | 4.29/5 |
| Vol 5 | 2.89/5 | 3.99/5 |
| Vol 6 | 3.21/5 | 4.19/5 |
| Vol 7 | 3.26/5 | 4.18/5 |
| Vol 8 | 3.36/5 | 4.27/5 |
| Vol 9 | 3.47/5 | 4.30/5 |
| Vol 10 | 3.21/5 | 4.22/5 |
| Vol 11 | 2.59/5 | 3.98/5 |
| Vol 12 | 3.10/5 | 4.08/5 |
| Vol 13 | 3.24/5 | 4.26/5 |
| Vol 14 | 3.34/5 | 4.25/5 |
| Vol 15 | 3.27/5 | 4.24/5 |
| Overall | 3.18/5 | 4.30/5 |