Wales constituency results seem a little low

Flagging here. When doing regional analysis Wales seems to have low values per-household for many reforms/baseline variables compared to other regions. @MaxGhenis @vahid-ahmadi 

<img width="673" height="615" alt="Image" src="https://github.com/user-attachments/assets/4dbf8e04-959a-49a3-ad62-1f4493d927c0" />