BBC News Online readers named McCartney the "greatest composer of the millennium", and BBC News cites his Beatles song "Yesterday" as the most covered song in the history of recorded music—by over 2,200 artists—and since its 1965 release, has been played more than 7,000,000 times on American television and radio according to the BBC. Wings' 1977 single "Mull of Kintyre" became the first single to sell more than two million copies in the UK, and remains the UK's top selling non-charity single. Based on the 93 weeks his compositions have spent at the top spot of the UK chart, and 24 number one singles to his credit, McCartney is the most successful songwriter in UK singles chart history. As a performer or songwriter, McCartney was responsible for 32 number one singles on the US Billboard Hot 100 chart and has sold 15.5 million RIAA certified albums in the US alone.