§ Sir Keith Joseph
The latest figures available are for 1983–84 when 20,260 teachers left maintained nursery, primary and secondary schools in England and Wales prior to age 60 on grounds other than premature retirement. This figure represents 4.9 per cent. of the teaching force, a proportion which has remained fairly steady since 1982–83 after falling gradually from a level of 6.3 per cent. in 1979–80.