Most South Wales, Valley and Mid Wales lines saw increases in usage this year, but there were falls on the West Wales and North Wales lines.
Gwelodd y rhan fwyaf o reilffyrdd y De, y Cymoedd a'r Canolbarth gynnydd mewn defnydd eleni ond roedd gostyngiad ar reilffyrdd y gorllewin a’r gogledd.