§ 1985 and 1990. Mr. BatisteTo ask the Secretary of State for Energy by how much British Coal's productivity increased between(a) 1974 and 1979, (b) 1980 and 1984 and (c)
§ Mr. Heathcoat-AmoryBetween 1973–74 and 1978–79 British Coal's productivity increased by 4.2 per cent., between 1979–80 and 1983–84 it increased by 5.2 per cent., and between 1984–85 and 1989–90 the increase was 107.7per cent.