You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

The chocolate bar is structured in two layers; a lightly-whipped nougat layer, with a lower layer of cereal 'crispies', these are then coated in milk chocolate. Originally the bar contained raisins within the base layer; however, consumer research in the mid-1980s led to these being removed and the current formulation being introduced. Television adverts in the 1970s featured Willie Rushton before a mascot named Dougie the Double Decker Dog was introduced.
did double deckers used to have raisins in?