There is no official data for visual snow incidence but search data can help to (roughly) map where visual snow could be more prevalent and provides a representation for how common visual snow is. Ranking a selection of the world’s visual snow countries: the US and Germany lead on overall searches; when adjusted for the corresponding internet population it is however Finland and Sweden that lead the rankings.
Visual Snow Countries
Average Monthly Search Volume For Visual Snow Per Country
Average Monthly Search Volume For Visual Snow Per 100,000 (Google Reach Population)
Data sources: Google Keyword Planner, KWFinder, Yandex Keyword Statistics (For Russia only), Google Trends, The New Zealand Medical Journal.
Bing and other search data outside the above sources was not included.
This is a selection of visual snow countries, not a definitive ranking.
Netherlands, Russia, Poland and Germany include an additional translated search word for “visual snow” : oogruis, визуальный снег, śnieg optyczny, Augenrauschen.