A histogram: a bar per bin, the bins along the category axis with no gap between them unless
the group states one; a pareto's bars largest first with a line of the running share, drawn
from the first bar's center to the last's against a percentage axis on the right.
A histogram: a bar per bin, the bins along the category axis with no gap between them unless the group states one; a pareto's bars largest first with a line of the running share, drawn from the first bar's center to the last's against a percentage axis on the right.