This represents a continuation of structural change, which started in the 1960s, and which was marked by the growth in the transport of bulk cargoes, especially mineral oil, and the adoption of even larger and more specialised ships.
Lento imele utshintsho lweziqu oluqhubekayo eyaqala ngo 1960, eyayiphulwe ngokhulo kwizithuthi zeenkunzi zemithwalo, kanye i-oyile eyombiweyo nokwamkelwa ngokusemthethweni kweenqanawa zenkcubeko ezinkulu nezikwaninzi.