* No Central Registry: There's no database tracking hair styling habits globally or even within specific regions.
* Privacy: This kind of information is considered personal.
* Fluctuation: Hairstyling habits change over time due to trends, personal preferences, and cultural influences.
However, surveys and market research can give some insights into hair styling trends:
* Surveys: Some surveys might ask women/girls about their hair styling practices, including how often they straighten their hair. However, these surveys typically have a limited sample size and might not be representative of the entire population.
* Market Research: The hair care industry often conducts market research to understand consumer behavior, which might include data on the use of hair straighteners. This data is often proprietary.
If you're looking for specific data, you might try searching for market research reports on the hair care industry or looking for surveys related to beauty and personal care. Keep in mind that any data you find will likely be an estimate or a snapshot in time.