FOI003453 EIR Environmental Protection

I would like to request the following information under the Freedom of Information Act 2000.
The number of sites within your authority's area that have been formally determined as "contaminated land" under Part 2A of the Environmental Protection Act 1990, from 1 January 2017 to the date of this request, broken down year by year.
If your authority has made zero such determinations since 2017, please confirm this rather than treating it as "information not held."