| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.64/5 | 3.63/5 |
| Vol 2 | 2.56/5 | 3.69/5 |
| Vol 3 | 2.56/5 | 3.86/5 |
| Vol 4 | 2.51/5 | 3.75/5 |
| Vol 5 | 2.40/5 | 3.63/5 |
| Vol 6 | 2.46/5 | 3.58/5 |
| Vol 7 | 2.51/5 | 3.68/5 |
| Vol 8 | 2.50/5 | 3.78/5 |
| Vol 9 | 3.01/5 | 3.97/5 |
| Vol 10 | 2.85/5 | 3.99/5 |
| Vol 11 | 2.74/5 | 3.94/5 |
| Vol 12 | 2.83/5 | 4.02/5 |
| Vol 13 | 2.90/5 | 3.91/5 |
| Vol 14 | 2.80/5 | 4.00/5 |
| Vol 15 | 2.56/5 | 3.63/5 |
| Overall | 2.66/5 | 4.02/5 |