From the article:

> China used more cement in the last three years than the U.S. used in the entire 20th century.

It seemed strange to exclude years from the 21st century.

From 2011 to 2013, China consumed roughly 28 times that of the U.S.

From 2002 to 2013, China consumed roughly 15 times that of the U.S.

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http://www.ficem.org/boletines/ct-2013/presentaciones2013/1-...