Don't think I'm kidding you when I write "only 20%, lucky you!".
Serbia is not a real tourist destination, but it faces the same situation you wrote about, the decades-long population migration from the countryside to the big cities.
Especially Belgrade, Novi Sad and Nis.
With an additional burden on RE, which you in Spain probably did not feel. Migration of people from Ukraine and Russia.
Their emigration and search for apartments for rent in Novi Sad and Belgrade, where now at every step I can hear the Ukrainian or Russian language (I don't know how to make a difference, if there is one) was used by the owners of apartments for rent to such an extent that they rented apartments increased by 50%, by 100%...
I can't write about the state of the RE market in my city in this comment, so I'll write a post at some point 🙂
PS. In addition to Spain, Italy also has many tourist attractions, and Rome (the old city center) is literally an open-air museum - we commented on that a few years ago when we were on a tourist trip.