Numbers and percentages of the population living within 30, 60, and 90 min from the institute providing neuroendovascular treatment after the implementation of the drive and retrieve method
| ≥65 years of age | 90 min n (%) | 60 min n (%) | 30 min n(%) | |
| Sapporo | 594 555 | 593 860 (100) | 593 416 (100) | 588 409 (99) |
| Shiribeshi | 76 374 | 67 335 (88) | 55 690 (73) | 47 482 (62) |
| Minamisorachi | 58 872 | 58 872 (100) | 58 248 (99) | 46 575 (79) |
| Nakasorachi | 41 097 | 41 076 (100) | 31 725 (77) | 173 (0) |
| Kitasorachi | 13 168 | 12 961 (98) | 841 (6) | 0 (0) |
| Nishiiburi | 65 367 | 39 206 (60) | 0 (0) | 0 (0) |
| Higashiiburi | 59 286 | 59 122 (100) | 54 544 (92) | 3153 (5) |
| Total area | 1 558 387 | 924 553 (59) | 794 464 (51) | 685 792 (44) |