The lavish performance, in which a live band backs up hologram versions of the Abba members in a specially built arena, has been seen by over three million people.
Almost one in five is based outside the UK, according to a report from the consulting firm Sound Diplomacy.
"Since opening three years ago, the show has attracted visitors from all over the world, filled restaurants and hotels, and given concertgoers an unforgettable evening," said London Mayor Sadiq Khan, according to NME.
Visitors spent an average of 2,800 SEK per day in London, in addition to the ticket price.
