Boringness of data sets is not a legal reason to withhold data.
The only thing that matters is: 1) does your state/country have a public records disclosure law? and 2) What exemptions does it have for not disclosing? i.e. most states exempt agencies from disclosing records about undercover police officers and certain kinds of health records.
And 3) of course, does the government actually collect the data that you are asking for?
If so, then they can be compelled to send you the data, as per the state's regulations. If the government doesn't actually collect that data, then no, they don't have to collect it for you. Also, most state laws say that an agency does not have to provide new types of records or queries to you, if those queries aren't generated as part of the government's business.
For example, an agency may fight against a request that asks for pension amounts, aggregated by year/department, if they never conduct that aggregation themselves.