When did the newer dust bags come out?

Sharp Upright Types PU-2 Vacuum Bags - 9 Pack (EnviroCare 844-9

miele style gn dust bags

Miele Type Z Vacuum Bag - Miele Z Dust Bags – Vacuum Direct

Thamtu G20 Dust Bag & Filter

American Sanders Clarke EZ8 & OBS18 Dust Bag - New w/Rubber Boot