I’m Italian, lived both in big cities and in small villages, both in the north and the south of the country: basically every office has AC, never saw an hotel with no AC and I’d say at least 50% of private residences have it.

AC in private residences has become much more common in the last years due to the climate crisis but 5% would’ve been way off even 20 years ago. Your data is definitely incorrect

Edit: https://www.qualenergia.it/articoli/meta-famiglie-italiane-ha-condizionatore-ecco-come-usa/ some data. About 50% of private italian households have AC, with obvious differences between regions and local climates.