| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.05/5 | 4.06/5 |
| Vol 2 | 3.23/5 | 4.18/5 |
| Vol 3 | 3.28/5 | 4.25/5 |
| Vol 4 | 3.01/5 | 3.84/5 |
| Vol 5 | 3.22/5 | 4.04/5 |
| Vol 6 | 3.47/5 | 4.33/5 |
| Vol 7 | 3.21/5 | 4.00/5 |
| Vol 8 | 3.34/5 | 4.01/5 |
| Vol 9 | 3.39/5 | 4.28/5 |
| Vol 10 | 3.09/5 | 3.95/5 |
| Vol 11 | 3.44/5 | 4.28/5 |
| Vol 12 | 3.54/5 | 4.34/5 |
| Vol 13 | 3.57/5 | 4.38/5 |
| Vol 14 | 3.24/5 | 4.19/5 |
| Overall | 3.29/5 | 4.15/5 |