In 1980 there were about 22,000 general-cargo ships having a total tonnage of about 80 million grt.
Ngonyaka ka1980, kwakukho malunga namashuni amabini enesibini amawaka eenqanawa ezithutha imithwalo jikelele ezazinamalunga namashuni esibhozo ezigidi umthamo wenqanawa ye-oyile elinganiswe ngeetoni.