Description of Figure 8: Line chart showing the number of passenger journeys per head of population has been decreasing across Great Britain since 2008-09.
Disgrifiad o Ffigur 8: Mae’r siart llinell yn dangos bod nifer y siwrneiau gan deithwyr fesul pen o’r boblogaeth wedi bod yn gostwng ledled Prydain Fawr ers 2008-09.