Switzerland Imports from Philippines of Silk Yarn and Yarn Spun from Silk Waste; Silk Worm Gut was US$13 during 2012, according to the United Nations COMTRADE database on international trade. Switzerland Imports from Philippines of Silk Yarn and Yarn Spun from Silk Waste; Silk Worm Gut - data, historical chart and statistics - was last updated on June of 2024.