source: The number of communities where over 70 per cent of the population was able to speak Welsh dropped to 54 in the 2001 census, compared with 92 in 1991. 
target: Bu gostyngiad yn nifer y cymunedau lle’r oedd dros 70 y cant o’r boblogaeth yn medru’r Gymraeg i 54 yng Nghyfrifiad 2001 o’i gymharu â 92 ym 1991. 