Italy's Gigliola Cinquetti holds the record for largest victory by percentage, scoring almost three times as many as second place (49 points compared with 17 by the runner-up) in the 1964 contest.
Gigliola Cinquetti asal Italia memegang rekor untuk kemenangan terbesar menurut persentase, meraih skor hampir tiga kali lipat ketimbang peringkat kedua (49 poin berbanding dengan 17 dari runner-up) dalam kontes tahun 1964.