| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.31/5 | 4.05/5 |
| Vol 2 | 2.65/5 | 3.91/5 |
| Vol 3 | 3.07/5 | 4.22/5 |
| Vol 4 | 2.94/5 | 4.24/5 |
| Vol 5 | 2.92/5 | 4.05/5 |
| Vol 6 | 3.19/5 | 4.52/5 |
| Vol 7 | 2.93/5 | 4.26/5 |
| Vol 8 | 3.38/5 | 4.35/5 |
| Vol 9 | 3.39/5 | 4.34/5 |
| Vol 10 | 3.21/5 | 4.43/5 |
| Vol 11 | 3.24/5 | 4.44/5 |
| Vol 12 | 3.30/5 | 4.43/5 |
| Vol 13 | 3.20/5 | 4.30/5 |
| Overall | 3.06/5 | 4.52/5 |