In Czechia we have 12-8 rule. If you arrive at a pub at noon, you drink 8 Beers. If you go at 8pm, its 12 you have to drink. So I would say tourism has little effect /s

You must work at the FAO. If you look at section VI of their methodology, they attempt to adjust for tourism: https://fenixservices.fao.org/faostat/static/documents/FBS/New%20FBS%20methodology.pdf