At this map, which I’ve just found within Wkipedia, we can see different levels of blonde-haired-people density. The darker color means lesser level; the highest level is more than 80% (Scandinavia), the darkest colors - no more than 1%.
Looking at this map I think about two moments: the first is the fact of widespread passion and love of blonde women in men’s wishes, the second is the connection between this love and number of blondes. The problem is that generally blondes are beloved by “black”-haired-people, but due to genetic instability of blonde color the higher is this love - the faster is disappearing of these beautiful almost-angels:(