In the 1940s, the average person in the US was drinking nearly twice as much coffee...Researchers attribute this to advertising as well as product innovations.
Since then, coffee consumption has slowed, partially due to the popularity of other beverages like carbonated soft drinks.
The number of US adults having a cup daily is up 37% since 2004, as the coffee industry markets growth in upscale shops.
US workers clocked 1,989 hours a year in 1950 compared to 1,757 in 2017, suggesting decreased need for caffeine with less work and more sleep.
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