It could be many different percent's. Due to people's personal opinion on reviews. If someone is making a report on how many percent of female's dye there hair on a school, It would be a different percent to other school's. But trust me, A lot of girls dye there hair
I sure do! And I will continue to do so until the blond goes away and it's much more grey or white. It looks disgusting if I don't color it. All of the women in my immediate family have dyed their hair from their 30's until their hair was grey enough to look good. That transition doesn't look good on everyone.