In absolute figures (estimate): 1  4,968,429 young people under 15 years old ( 2,534,785 males / 2,433,645 females) 2  10,495,608 persons between 15 and 64 years old ( 5,175,172 males / 5,320,437 females) 3  1,062,137 persons above 64 years old ( 510,328 males / 551,644 females)
Median income for a one-person household is $27,237 while typical income for a two-person household is $58,121. Median income rises as household size increases, peaking at 4-person households with a median income of $75,343.
For a one-person household, that would be $21,180; for two people, $27,697, for three people $34,214; for four people, $40,731; for five people, $47,248; for six people; $53,765, for seven people, $54,987; for eight people, $56,209 (for each additional person, add $1,222 to annual income.).