| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.40/5 | 4.00/5 |
| Vol 2 | 2.28/5 | 4.14/5 |
| Vol 3 | 2.62/5 | 4.06/5 |
| Vol 4 | 2.43/5 | 4.19/5 |
| Vol 5 | 2.22/5 | 3.59/5 |
| Vol 6 | 2.39/5 | 3.95/5 |
| Vol 7 | 2.42/5 | 3.81/5 |
| Vol 8 | 2.22/5 | 4.03/5 |
| Vol 9 | 2.32/5 | 4.23/5 |
| Vol 10 | 2.46/5 | 4.23/5 |
| Vol 11 | 2.59/5 | 4.25/5 |
| Vol 12 | 2.71/5 | 4.30/5 |
| Vol 13 | 2.50/5 | 4.09/5 |
| Vol 14 | 2.81/5 | 4.25/5 |
| Vol 15 | 2.40/5 | 4.14/5 |
| Vol 16 | 2.43/5 | 3.94/5 |
| Vol 17 | 2.63/5 | 4.12/5 |
| Vol 18 | 2.75/5 | 4.21/5 |
| Vol 19 | 2.32/5 | 4.00/5 |
| Vol 20 | 2.26/5 | 4.19/5 |
| Overall | 2.46/5 | 4.30/5 |