1. Create a new constituent query
2. On the Criteria tab, select the following fields:
Constituency, Constituency code Not Blank
3. Save and close the new query
4. Go to Reports, Demographic and Statistical Reports, Tallies Report and create a new one
5. On the General Tab, Include Selected Records and include the query created in step 1
6. On the Fields tab, select Field to Use: constituency code
7. Preview the report - A list will appear of all constituency codes and the number of records that use any code listed.