Graphs/chart/statistics in redmine?

Question

Redmine

Good day! Question one:
How can I implement a graph, chart in redmine in the following way. I don't need to track the number of tasks, but I need the content. For example, there is a "System" field, which is specified in the task. I would like to make a diagram (graph) for this field in order to monitor which system prevails in tasks. Tell me which direction to look. Thanks a lot!