Statistics names are shown wrong

Thijs de Jong
2019-11-20T21:16:14+01:00

The statistics for ``number of members per committee`` shows the names wrong.

### Current behaviour / Reproducing the bug
The statistics for ``number of members per committee`` shows names of the committee underneath the bars, but not underneath every bar. Only per 2 bars, and when there are more committees, there are less and less committee names.

### Expected behaviour
Every bar has a name underneath it.