Census Key Statistics Table KS14: National Statistics Socio-economic Classification. For long-term unemployed year last worked is 1999 or earlier. In the NS-SeC classification; all full time students are recorded in the 'full-time students' category regardless of whether they are economically active or not. 'Not classifiable for other reasons' includes people whose occupation has not been coded. Cells in this table have been randomly adjusted to avoid the release of confidential data. All data is © Crown Copyright 2003. Census day was 29 April 2001.