The ranking system gives each show of an artist a different amount of points, related to the exhibition's characteristics.

The line graph represents the average value of the points given to an artist in one year; the error plots, corresponding to every average value, run between the minimum and the maximum amount of points given to an artist by a single exhibition in that year.

The table below shows in addition the median value (explanation wikipedia.org).

This chart indicates if the points the artist receives per exhibition are rising or declining on average and absolute. An artist can compensate higher evaluated shows with a greater number of shows of minor 'quality', the value of the median exhibition explains to which typology the artist tends to.

A rising or steady average stands for a firm foothold in the art world.