In the United Kingdom, the film grossed £4.1 million ($6.4 million) from its Monday preview screenings. It grossed £6.3 million ($9.2 million) on its opening day and then £5.7 million ($8.8 million) on Wednesday, setting UK records for both days. In the film's first seven days it grossed £41.7 million ($63.8 million), breaking the UK record for highest first-week opening, set by Harry Potter and the Prisoner of Azkaban's £23.88 million ($36.9 million) in 2004. Its Friday–Saturday gross was £20.4 million ($31.2 million) compared to Skyfall's £20.1 million ($31 million). The film also broke the record for the best per-screen opening average with $110,000, a record previously held by The Dark Knight with $100,200. It has grossed a total of $136.3 million there. In the U.K., it surpassed Avatar to become the country's highest-grossing IMAX release ever with $10.09 million.

Answer this question, if possible (if impossible, reply "unanswerable"): Which movie previously had the highest earnings for its first seven days?
Harry Potter and the Prisoner of Azkaban