Ƙirƙirar wani nau'i mai rikitarwa na wannan jumla Kasuwancin kwantena ya karu da yawa daga cikin kaya da aka ɗora da kuma saukewa a cikin tashar jiragen ruwa.
Tabbas, mafi mahimmancin jumlar ita ce "Container traffic ya kara yawan kayan da aka ɗora da kuma saukewa a cikin Port; a ƙarshen shekarun 1960, Port of Oakland ita ce tashar jiragen ruwa ta biyu mafi girma a duniya a cikin tashar jiragen ruwa. "