As at 31 December 2007, there were 147,367 subject profiles on the National DNA Database (NDNAD) from persons currently aged under 16 submitted by forces in England and Wales. The estimated number of individuals represented on the NDNAD is lower than the number of subject profiles as some profiles are replicates. The subject profile replication rate is currently calculated as 13.3 per cent. The estimated number of individuals aged under 16 is, therefore, 127,767.