Adding another bar to the bar chart block

Hi there,

I am trying to create a Graph Block which will help to compare a target value against a different projected value. At the moment I am only able to add either the target values or projected values into a Graph Block, but what I would like is to group both values together on the Y axis so they can be directly compared.

Here is a copy of the example table:

If you have any advice on what I could do to achieve this that would be great!

Cheers,
Michael