120 Years of U.S. Residential Housing Stock and Floor Space.

PLoS One · 2015 · PMC4532357 · PMID 26263391

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a clear trendno p-value reported

The observed increase in average floor space is a clear trend, which might only be attenuated if the rate of construction of single-family homes or retirement of older units also slows down.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.