I don't get his terminology, though. If you calculate the percentage he indicates (assuming "Labor Pool" = total working-age population), you get the employment rate (called by OECD employment/population ratio). If you subtract that from 100%, you don't get the unemployment rate, you get the percentage of (unemployed persons + NILF).
Either that or he's calling "Labor Pool" what he elsewhere calls "Labor Force".
Am I missing something, as they say?