| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.39/5 | 4.33/5 |
| Vol 2 | 3.15/5 | 4.14/5 |
| Vol 3 | 3.29/5 | 4.28/5 |
| Vol 4 | 3.34/5 | 4.31/5 |
| Vol 5 | 3.42/5 | 4.33/5 |
| Vol 6 | 3.36/5 | 4.29/5 |
| Vol 7 | 2.98/5 | 4.07/5 |
| Vol 8 | 3.52/5 | 4.40/5 |
| Vol 9 | 3.54/5 | 4.34/5 |
| Vol 10 | 3.42/5 | 4.35/5 |
| Vol 11 | 3.26/5 | 4.22/5 |
| Vol 12 | 3.51/5 | 4.36/5 |
| Vol 13 | 3.80/5 | 4.47/5 |
| Vol 14 | 2.97/5 | 4.20/5 |
| Vol 15 | 3.35/5 | 4.31/5 |
| Overall | 3.36/5 | 4.30/5 |