31% of people who report their general health as good or very good volunteer, compared with 13% who report having bad or very bad health.
Mae 31% o bobl sy'n nodi bod eu hiechyd cyffredinol yn dda neu’n dda iawn yn gwirfoddoli, o'i gymharu â 13% sy'n dweud bod ganddynt iechyd gwael neu wael iawn.