Total freight traffic at ports in Wales fell by 3.6% in 2017 to 51.6 million tonnes (Mt), its lowest level since comparable records began in 1976.
Gostyngodd cyfanswm y traffig nwyddau ym mhorthladdoedd Cymru o 3.6% yn 2017 i 51.6 miliwn tunnell (Mt), ei bwynt isaf ers cychwyn cofnodion tebyg yn 1976.