Data Computed By NBER By Subtraction Of The Unemployment Rate From 100%. Figure For March 1912 Was Affected By The National Coal Dispute. Indications From Labour Gazette (Computation) Show October 1918 To Have The Lowest Unemployment Point (0.08). April-August 1921 Figures Were Affected By The General Coal Stoppage, As Were The Figures For May-December, 1926. Source: Computed By NBER From Data In Abstract Of Labor Statistics, 10Th Abstract, P. 3; 17Th Abstract, P. 8; 19Th Abstract, P. 81.
This NBER data series m08003 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08003
Release: NBER Macrohistory Database
National Bureau of Economic Research, Percentage Employed, Metal Engineering and Shipbuilding Workers, Trade Union Members for Great Britain [M08003GBM515NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08003GBM515NNBR/, October 4, 2015.