Empty columns in clustered column chart

Hello,

is there any way to get rid of the unused columns, or to center them? You see, in the graphs below, in rating 1 Superb the graph used the katowice number, but it is un-necessary to have space reserved for katowice in column 3 OK. I would like to have columns centered, as the un-necessary space is wasteful there.

The same is in the secon graph, where the system reserved space for Hungary, and there is zero ratings for it, so the column is blank/empty, but reserved.

Thank you