| Level Range | Attempts | Success | Failure | % Success |
| 300-319 | 1431 | 299 | 1132 | 20.89 |
| 320-339 | 342 | 93 | 249 | 27.19 |
| 340-359 | 426 | 97 | 329 | 22.77 |
| 360-379 | 732 | 212 | 520 | 28.96 |
| 380-399 | 514 | 162 | 352 | 31.52 |
| 400-419 | 784 | 287 | 497 | 36.61 |
| 420-439 | 673 | 251 | 422 | 37.30 |
| 440-459 | 587 | 246 | 341 | 41.91 |
| 460-479 | 588 | 262 | 326 | 44.56 |
| 480-499 | 443 | 222 | 221 | 50.11 |
| 500-519 | 998 | 467 | 531 | 46.79 |
| 520-539 | 463 | 215 | 248 | 46.44 |
| 540-559 | 552 | 296 | 256 | 53.62 |
| 560-579 | 385 | 237 | 148 | 61.56 |
| 580-599 | 326 | 185 | 141 | 56.75 |
| 600-619 | 364 | 226 | 138 | 62.09 |
| 620-639 | 265 | 156 | 109 | 58.87 |
| 640-659 | 224 | 161 | 63 | 71.88 |
| 660-679 | 173 | 115 | 58 | 66.47 |
| 680-699 | 143 | 111 | 32 | 77.62 |
| 700-719 | 172 | 121 | 51 | 70.35 |
| 720-739 | 103 | 75 | 28 | 72.82 |
| 740-759 | 111 | 84 | 27 | 75.68 |
| 760-779 | 102 | 76 | 26 | 74.51 |
| 780-799 | 67 | 58 | 9 | 86.57 |
| 800-819 | 96 | 81 | 15 | 84.38 |
| 820-839 | 61 | 46 | 15 | 75.41 |
| 840-859 | 50 | 45 | 5 | 90.00 |
| 860-879 | 43 | 37 | 6 | 86.05 |
| 880-899 | 40 | 35 | 5 | 87.50 |
| 900-919 | 68 | 61 | 7 | 89.71 |
| 920-939 | 29 | 27 | 2 | 93.10 |
| 940-959 | 30 | 29 | 1 | 96.67 |
| 960-979 | 41 | 40 | 1 | 97.56 |
| 980-999 | 1399 | 1396 | 3 | 99.79 |