There is a bar graph showing the average number of people out of 1000 with dementia, by age.

Ages 65-74
Women: 25 (estimate)
Men: 20 (estimate)
Total: 24

Ages 75-84
Women: 120 (estimate)
Men: 105 (estimate)
Total: 111

Ages 85+
Women: 370 (estimate)
Men: 290 (estimate)
Total: 345