In fact, the survey showed that only 12% of those over 30 used the form 'zee'. This is hypothesized to be tied to an American children's song frequently used to teach the alphabet. In this song, the rhyme scheme matches the letter Z with V 'vee', prompting the use of the American pronunciation.
In reality, the survey indicated that only 12% of those over 30 utilized the 'zee' form, which is inferred to be linked to a well-known American children's song frequently employed to instruct the alphabet. The rhyme scheme in this song pairs the letter Z with V 'vee', resulting in the use of the American pronunciation.