* Hair color is complex: Hair color is determined by multiple genes and varies greatly depending on ethnicity and ancestry.
* No comprehensive data: There's no global census or database specifically tracking hair color.
* Subjectivity: Defining "black hair" can be subjective. Some might consider very dark brown hair to be black, while others have a stricter definition.
However, we can say that:
* Black hair is most prevalent in: People of African descent have a higher likelihood of having black hair compared to other ethnicities.
* Other groups with black hair: Some individuals in Asia and other parts of the world also have black hair.
Instead of focusing on a percentage, it's more accurate to say that black hair is common in certain populations and is a beautiful and diverse feature of human appearance.