Median Age is the normal age of the population. Fifty percent on the inhabitants is older and the opposite half is more youthful. Gender is self-documented by people when asked with regards to their intercourse at birth.?i?u ki?n ???tham gia, nh?n th??ng r?t ??n gi?n và ti?n l?i, phù h?p v?i t?t c??m?i ng??i.B??c 3: Th?c Hello?n giao d?ch n?p ti?