Voyages through the Strait of Hormuz have more than quadrupled in the past week amid growing confidence in the US and Iran’s 60-day ceasefire, the Financial Times reports.

The number of traceable journeys by ships passing into and out of the Gulf each day has increased from between one and two for the majority of the conflict to eight on July 1, according to a moving seven-day average from maritime data platform Signal.

Hapag-Lloyd, the major container shipping line, told the FT on Thursday that four ships previously stuck in the Gulf were now out, while rival Maersk said two of its vessels had left the strait last week.

Before the conflict, roughly a fifth of the world’s oil and gas passed through the strait, with around 135 vessels per day making the transit.