 The labour force participation rate (LFPR) is the number of people in the labour force divided by the size of the adult civilian non-institutional population (or by the population of working age that is not institutionalized), LFPR = LF/Population.The non-labour force includes those who are not looking for work, those who are institutionalized (such as in prisons or psychiatric wards), stay-at-home spouses, children not of working age, and those serving in the military.The unemployment level is defined as the labour force minus the number of people currently employed.