| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.99/5 | 4.04/5 |
| Vol 2 | 2.84/5 | 4.13/5 |
| Vol 3 | 3.23/5 | 4.29/5 |
| Vol 4 | 3.02/5 | 4.25/5 |
| Vol 5 | 3.15/5 | 4.30/5 |
| Vol 6 | 3.10/5 | 4.09/5 |
| Vol 7 | 3.29/5 | 4.23/5 |
| Vol 8 | 3.08/5 | 4.30/5 |
| Vol 9 | 3.09/5 | 4.15/5 |
| Vol 10 | 3.05/5 | 4.17/5 |
| Vol 11 | 3.04/5 | 4.06/5 |
| Vol 12 | 2.80/5 | 4.03/5 |
| Vol 13 | 3.12/5 | 4.24/5 |
| Vol 14 | 2.95/5 | 4.09/5 |
| Vol 15 | 3.21/5 | 4.30/5 |
| Vol 16 | 3.25/5 | 4.33/5 |
| Vol 17 | 2.96/5 | 3.97/5 |
| Vol 18 | 2.70/5 | 3.94/5 |
| Vol 19 | 2.87/5 | 4.13/5 |
| Vol 20 | 3.08/5 | 4.29/5 |
| Vol 21 | 3.08/5 | 4.18/5 |
| Vol 22 | 3.23/5 | 4.30/5 |
| Vol 23 | 3.18/5 | 4.23/5 |
| Overall | 3.06/5 | 4.33/5 |