Prices for U.S. exports fell 0.1 percent in December, the first monthly decline for the index since a 0.1-percent decrease in June. The December drop was led by falling agricultural prices; the price index for nonagricultural prices recorded no change. Export prices rose 2.6 percent in 2017 following a 1.3-percent rise in 2016. The 2017 advance was the largest calendar-year increase since 2011 when the index rose 3.6 percent.