May 25, 2010. /Lesprom Network/. U.S. total printing-writing paper shipments increased 10% in April compared to April 2009 - the sixth consecutive year-over-year (YOY) increase and the third double-digit YOY increase, the American Forest & Paper Association said in a statement received by Lesprom Network. Three of the four major printing-writing grades posted double-digit increases compared to last April, while the fourth was down less than one percent. U.S. purchases (shipments + imports - exports) of printing-writing papers also increased in April, up 7% YOY April. Total printing-writing paper inventory levels decreased slightly from March 2010, down 3%. The American Forest & Paper Association is the national trade association of the forest products industry, representing pulp, paper, and wood products manufacturers, and forest landowners.