Adjust the age range to be 18-44, and you see that ALL cities are lopsided male below 44. Since there are roughly the same number of men and women out there, how can this possibly be right?
"Single is counted as being never married, divorced or widowed."
Aha. So this is ACTUALLY a map of when people first marry, and females tend to uniformly marry [and divorce] earlier, versus men who sometimes wait until later. Thank goodness, the map was really starting to worry me.
There aren't the same number of men and women out there. There are a lot more older women than older men.
That said, I don't see why the definition of "single" makes a difference to you, unless your concern was that we're going to have a catastrophic shortage of women in 50 years. Women may simply marry earlier in life, but you're still just as screwed if you're a young guy (Or not, as the case may be.)
I'd seen this before, but not with the age being adjustable. I see that the male to female ratio is significantly worse for my location, sexual preference, and age range than it was just for the first two.
"Single is counted as being never married, divorced or widowed."
Aha. So this is ACTUALLY a map of when people first marry, and females tend to uniformly marry [and divorce] earlier, versus men who sometimes wait until later. Thank goodness, the map was really starting to worry me.