Right now, 12 million out of 118 million U.S. households have a Keurig machine, says David Sachs, vice president of brand management and innovation at Green Mountain.
Which is even higher than today based on the diagram in the marketwatch article:Total coffee consumption in the US has remained virtually unchanged since WWII, despite an expanding population, a growing economy, and rising real income. Per capita consumption of regular coffee has declined by about 40 percent since 1946 - from 26.9 pounds (green bean equivalent) to 16.2 pounds in 1975.
Based on these shifts, coffee would appear to be an "inferior" item - that is one whose consumption falls as income rises. But even though there is admittedly little room for increased consumption of a traditional item such as coffee as additional income is spent on more luxurious items, this beverage is not generally looked upon as a "cheap" drink that becomes unacceptable to richer tastes.