Of the total freight tonnage at major ports in Wales, 87.2% was international traffic with just over three quarters (76.8%) of this international traffic being imports.
O gyfanswm pwysau’r nwyddau a gludwyd drwy brif borthladdoedd Cymru, roedd 87.2% yn draffig rhyngwladol, gydag ychydig dros dri chwarter (76.8%) yn fewnforion.