Number and proportion of adults with autism by age and gender
| Age | Gender, n (%) | Autism, n (%) | Without autism, n (%) |
| All adults aged 25+ | Male n=1 781 455 (100) | 4610 (0.3) | 1 776 845 (99.7) |
| Female n=1 965 129 (100) | 2039 (0.1) | 1 963 090 (99.9) | |
| All n=3 746 584 (100) | 6649 (0.2) | 3 739 935 (99.8) | |
| 25–34 years | Male n=328 607 (100) | 1753 (0.5) | 326 854 (99.5) |
| Female n=338 720 (100) | 636 (0.2) | 338 084 (99.8) | |
| All n=632 488 (100) | 2389 (0.4) | 664 938 (99.6) | |
| 35–44 years | Male n=357 670 (100) | 1117 (0.3) | 356 553 (99.7) |
| Female n=377 084 (100) | 471 (0.1) | 376 613 (99.9) | |
| All n=734 754 (100) | 1588 (0.2) | 733 166 (99.8) | |
| 45–54 years | Male n=384 517 (100) | 890 (0.2) | 383 627 (99.8) |
| Female n=402 239 (100) | 377 (0.1) | 401 862 (99.9) | |
| All n=786 756 (100) | 1267 (0.2) | 785 489 (99.8) | |
| 55–64 years | Male n=326 922 (100) | 474 (0.1) | 326 448 (99.9) |
| Female n=340 491 (100) | 233 (0.1) | 340 258 (99.9) | |
| All n=667 413 (100) | 707 (0.1) | 666 706 (99.9) | |
| 65+ years | Male n=383 739 (100) | 376 (0.1) | 383 363 (99.9) |
| Female n=506 595 (100) | 322 (0.1) | 506 273 (99.9) | |
| All n=890 334 (100) | 698 (0.1) | 889 636 (99.9) |