Source: US. Bureau of the Census
Unfilled Orders to Shipments Ratio Excludes Semiconductor Manufacturing. Also, the Ratio of Unfilled Orders to Shipments excludes the following industries with no unfilled orders: Wood products; nonmetallic mineral products; medical equipment and supplies; office supplies; other miscellaneous manufacturing; cutlery and handtools; farm and garden machinery; computer storage and peripheral devices; audio and video equipment; manufacturing and reproducing magnetic and optical media; batteries; automobiles; light trucks and utility vehicles; heavy duty trucks; and miscellaneous furniture.
US. Bureau of the Census, Ratio of Manufacturers' Total Inventories to Unfilled Orders for Durable Goods Industries [AMDMUS], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/AMDMUS, July 29, 2016.