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The U.S. economy’s service sector expanded in December at the fastest pace in four and half years, the Institute for Supply Management said Wednesday.

U.S. manufacturing activity declined in September but continued to show expansion, the Institute for Supply Management said Friday.

The U.S. economy’s service sector expanded in June but its expansion rate fell to a four-month low, the Institute for Supply Management said Tuesday.

The U.S. economy’s service sector grew in March at the fastest pace since May 2006, the Institute for Supply Management said Monday.