What percentage of the Scottish population has natural red hair?

As of 2015, it was known that less than two (2)% of the world's population had natural red hair. That was approximately 140 million people worldwide. Scotland boasted the highest percentage of natural redheads, with 13% (40% of the Scottish people might carry the needed gene). Ireland came in second with about ten (10) percent.

Specifically, red hair is now said to occur naturally in 1–2 percent of the human population. It is believed to occur more frequently (2–6%) in people of northern or western European ancestry. It has less frequently in other populations. Red hair appears most commonly in people with two copies of an inherited recessive gene on chromosome 16 which produces an altered version of the hair color protein in people.

Also, one more interesting fact about red hair, it has been determined that red hair will never turn grey; it simply fades to white when the time comes.