I am writing to request information under the Freedom of Information Act 2000. Please provide the following details:

1. The total number of Data Subject Access Requests (DSARs) received by your authority for each of the last three years (2021, 2022, and 2023).

2. The number of DSARs completed within the statutory one-month timeframe during each year.

3. The number of DSARs that required an extension beyond the one-month timeframe, along with the average length of extensions granted.

4. Any recorded costs (e.g., staff time, software, or other resources) associated with processing DSARs for each of these years.