This is made up of UPC of -15,900 for males aged 18 to 25 years old, and a UPC of -4,000 for females aged 18 to 25 years old.
Mae hyn yn cynnwys UPC o -15,900 ar gyfer gwrywod 18 i 25 oed, ac UPC o -4,000 ar gyfer benywod 18 i 25 oed.