I don't believe you can do exactly what you are wanting, essential stacking the graphs on top of each other. However, there are a few alternatives if the key is to be able to have each category on their own axis (because you need a different scale for these).
Option 1: Put the year on Columns shelf and value you are plotting on your Rows.
The bars would then be vertical instead of horizontal, and each category would then have their own axis.
Option 2: Move Category from Rows to Columns.
This will create 6 side-by-side graphs with the vertical bars, each with their own axis (and thus can have own scale).