Across developed countries,only ____ of persons in their 60s are afflicted with dementia,but the prevalence rises steeply after age 75 and reaches over ____ beyond age 85.

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The prevalence of dementia in developed countries is relatively low for those in their 60s, at about 1-2%, but it increases significantly with age, reaching over 50% for those beyond age 85.

Across Developed Countries,only ____ of Persons in Their 60s Are