Median Age is the normal age from the population. 50 % of your populace is older and one other 50 percent is youthful. Gender is self-documented by individuals when questioned regarding their intercourse at beginning. M?t kh?u: B?n c?n thi?t l?p m?t kh?u d??nh??nh?ng v?n ??m b?o an toàn b?