The Center for Disease Control in the US periodically publishes updates on health statistics. Here is a chart showing age distribution of three common problems – arthritis, hearing trouble and vision trouble (even after corrective eyewear).
The CDC reports this data in age brackets. For this chart, I interpolated that data – because a line chart makes the age distribution easier to understand. I also placed a dividing line at age 55, to split the adult population into two groups. (Choosing 55 was an arbitrary decision, I did it just to make the information easier to discuss.)