Chart/Module:Chart/doc

Module Chart exports two functions: bar chart and pie chart


 * Note - Template:Graph:Chart is an alternative template, that may be more suitable for your use case.

Stacked
Here is the same graph, with more modest height and width, using "stack", and adding "units suffix" for good measure:

Scale per group
This option has been disabled. It was rarely used and broke in the last code update. Here is an example with large number of groups - mainly to test how it looks with large number of legends:

If there are many values, x legends can be diluted by using delimiters with nothing in between: