Wales was also included as an additional 21 st panel country, with 500 respondents from Wales sampled, who answered the same questions as the 20 core panel countries.
Cafodd Cymru ei chynnwys hefyd fel 21ain wlad banel ychwanegol, a chafodd sampl o 500 o ymatebwyr yng Nghymru yr un cwestiynau â’r 20 o wledydd panel craidd.