How are the U.S./Japan/Sweden different from U.K./China/Norway?

I took a list of the top 30 economies in the world, and sorted them by one variable. 

These countries were in one group: United States, Japan, Italy, Russia, Spain, Mexico, Netherlands, Belgium, Sweden, Saudi Arabia, Taiwan, Austria, South Africa, Iran, and Thailand. (15)

These countries were in the other: China, Germany, France, United Kingdom, Brazil, Canada, India, Australia, South Korea, Turkey, Indonesia, Switzerland, Poland, Norway, and Argentina. (15)

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On what variable were they sorted?

Find out below the fold…

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