"Age barometer for americans" joke

How many of these do you remember?
Blackjack chewing gum
Wax Coke-shaped bottles with colored sugar water
Candy cigarettes
Soda pop machines that dispensed bottles
Coffee shops with table side jukeboxes
Home milk delivery in glass bottles with cardboard stoppers
Party lines
Newsreels before the movie
P.F. Flyers
Butch wax
Telephone numbers with a word prefix (Olive - 6933)
Peashooters
Howdy Doody
45 RPM records
S&H Green Stamps
Hi-fi's
Metal ice trays with levers
Mimeograph paper
Blue flashbulbs
Beanie and Cecil
Roller skate keys
Cork popguns
Drive-ins
Studebakers
Wash tub wringers
If you remembered 0-5 = You're still young
If you remembered 6-10 = You are getting older
If you remembered 11-15 = Don't tell your age
If you remembered 16-25 = You're older than dirt!