Start a new Open Data project: how to understand demand?

Hello,

I am involved in a project to start publishing OD at the council I work for. One the challenges I have encountered is to understand what's the demand for OD in my council area, i.e., what sort of data are people interested in?

I thought using google analytics was a good start by checking whether people and using keywords related to freedom of information, open data, etc, but the information I get from it is little.

Any suggestions/advice on how to investigate what data is the public interested in, in my area?

Thank you,

I.