From 1981 to 1989, the American gross domestic product, in constant dollars, expanded by a third.

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U.S. real gross domestic product (real GDP shown in constant 2005 dollars) grew every year except for a small decline in 2009.

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Throughout his long and storied career, Neil Young has been a virtual factory of songs, musical innovation, ideas, inventions and a near-constant stream of new product.

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Thus began a process of constant iteration, where each version of the product saw the product getting simpler and more applicable to a broader section of the population.

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License updates and product support was up 3%, or 8% in constant currency.

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And while the U.S. Consumer Product Safety Commission calls magnets the No. 1 hidden home hazard, constant awareness can prevent injury.

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Mike Strutton, Vitrue's director of product management, attributes much of Palin's popularity to Fey and Saturday Night Live's constant skewering.

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