Coincident full censuses have taken place in the different jurisdictions of the United Kingdom every ten years since 1801, with the exceptions of 1941 (during the Second World War) and both Northern Ireland and the Irish Free State in 1921. Simultaneous censuses were taken in the Channel Islands and the Isle of Man, with the returns being archived with those of England. In addition to providing detailed information about national demographics, the results of the census play an important part in the calculation of resource allocation to regional and local service providers by the governments of both the UK and the European Union. The most recent UK census took place in 2011.