A grouped bar chart showing the share of Americans who have medical debt, by income and age group. Generally, those aged 65+ have much less debt than younger age groups. Those in middle income households (earning $50k-$100k for a family of three) have more debt than lower or higher income groups. The group with the highest occurrence of medical debt is middle income people aged 35 and under, at 27.4%. The group with the lowest occurrence of medicate debt is higher income people aged 65 and over, at 7.3%.