Figure 7: National Insurance number allocations to adult overseas nationals entering the UK from the EU and non-EU, year ending September 2006 to year ending June 2016
Source: Department for Work and Pensions, National Insurance number registrations to adult overseas nationals
The figures are based on recorded registration date on the National Insurance Recording and Pay As You Earn System (NPS), that is, after the NINo application process has been completed, and are not a direct measure of when a person migrated to the UK.
Although figures do accurately reflect the number of NINos registered over time, a change to the process of recording NINos during the quarter April to June 2014, means that the volume of NINo registrations recorded were lower in that quarter and then higher in the subsequent quarter July to September 2014 than would otherwise be the case. Comparisons of NINo registrations over time between these periods should be viewed with caution.