Click on the chart and use the left and right arrow keys to walk the countries, and the up and down arrow keys to move between the two ends of a pair. The gap between them travels with both ends, so a reader hears what the row does without holding one number while navigating to the other. Press B for braille, T for text descriptions, and S to toggle sonification.
The two ends are announced as Low and High —
AnyChart's own names for the fields the rows carry. A range series records
only which value is the smaller, never what the pair is a comparison
of, so it cannot say "1990" and "2019" here; a caller who has
those names sets startLabel and endLabel on the
emitted layer.