Declining energy costs fueled an unexpected 0.2% drop in U.S. producer prices in November, a figure that left the year-over-year rate of wholesale costs at its lowest level in 10 years, the Labor Department said Friday.

The producer price index was down 0.6% in the 12 months ended in November, the slowest rate of activity in producer prices since January 1987. So far in 1997, producer prices are down 1.2%.

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