As I have suggestg… there might be different censuses… 'cos we have less than 600 population and I’ve spoken with OH and he remembers when they only wanted his info. Sat at the kitchen table, CAgent questioning OH, me translating to English and then giving the Census agent OH’s answer…
or… the Census stuff has changed and now “they” want everyone… who knows, it will all sort itself out in the end… and if it isn’t sorted, it’s not the end 