80% according to this article: https://www.scmp.com/news/asia/east-asia/article/2126785/south-koreas-jeju-island-suffers-too-many-tourists https://www.scmp.com/

80% according to this article: https://www.scmp.com/news/asia/east-asia/article/2126785/south-koreas-jeju-island-suffers-too-many-tourists https://www.scmp.com/news/asia/east-asia/article/2126785/sou...