Cardiff has an ethnically diverse population due to its past trading connections, post-war immigration and the large numbers of foreign students who attend university in the city. The ethnic make-up of Cardiff's population at the 2011 census was: 84.7% White, 1.6% mixed White and Black African/Caribbean, 0.7% mixed White and Asian, 0.6% mixed other, 8.1% Asian, 2.4% Black, 1.4% Arab and 0.6% other ethnic groups. This means that almost 53,000 people from a non-white ethnic group reside in the city. This diversity, and especially that of the city's long-established African and Arab communities, has been celebrated in a number of cultural exhibitions and events, along with a number of books which have been published on this subject.