Group-of-Five (G-5) countries: France, West Germany, Japan, United Kingdom and United states. It is assumed that all … France, West Germany and Japan, and between 8 and 10 percent per annum for the U.K. and the U.S. for the period under study …, the productive efficiencies of France, West Germany and Japan rose rapidly from less than 40 percent of the U.S. level in …