180 years old:
1). People's numbers are just ok in MC_HorizontalLands;
2). People's numbers are fewer in MC_VerticalLands.
Notes:
People's numbers are according to from first floors more to 100floors, 200floors ... 1000floors fewer and fewer.

---

1). First 60 years old is old children leaders more because ages bigger;
2). Second 60 years old is youngest children leaders more because creators&expertors more;
3). Third 60 years old adjust MC_HonrizentalLands and MC_VerticalLands.