According to In Modern Era, Self-Storage Has Right Stuff, the self-storage industry’s revenue is up to $15 billion. We own so much stuff that one in every 11 American households has a self-storage unit:
American families at the middle of the middle class own more things, enjoy better health, have more choices than their grandparents — and (for most) their parents — did. The average home now has 3.1 televisions, on average, according to a survey done for the Consumer Electronics Association; in 1980, it was 1.7 per household. About 92% of households own a car, the most recent Department of Transportation survey found; even among households with incomes below $25,000, 80% own a car. Around 85% of households have air conditioning.