The line graphs illustrate the popularity of three boys’ names (Daniel, Oliver, and Alexander) and three girls’ names (Sophia, Isabella, and Emily) between 1925 and 2000. The data is measured in the number of names per thousand.
Overall, it is clear that all six names became significantly more popular towards the end of the period, especially after 1975. While boys’ names had some popularity from the beginning, girls’ names were almost unused until the final 25 years.
In 1925, Daniel was the most popular name at about 4 per thousand. Its popularity rose steadily to a peak of 12 per thousand in 1975, before dropping slightly to 10 per thousand by 2000. In contrast, Oliver and Alexander started very low, at around 1 per thousand. However, after 1975, both names saw a sharp increase, with Oliver reaching 11 and Alexander reaching 10 per thousand by the end of the period.
Regarding girls’ names, Emily was the only name with any usage before 1975, though it was very low (under 2 per thousand). Sophia and Isabella were almost at zero until 1975. However, between 1975 and 2000, all three names experienced a sudden and rapid growth. By 2000, Emily and Sophia both reached approximately 11 per thousand, while Isabella finished at 9 per thousand.