The people of Luxembourg are called Luxembourgers. The immigrant population increased in the 20th century due to the arrival of immigrants from Belgium, France, Italy, Germany, and Portugal; the latter comprised the largest group.  In 2013 about 88,000 Luxembourg inhabitants possessed Portuguese nationality. In 2013, there were 537,039 permanent residents, 44.5% of which were of foreign background or foreign nationals; the largest foreign ethnic groups were the Portuguese, comprising 16.4% of the total population, followed by the French (6.6%), Italians (3.4%), Belgians (3.3%) and Germans (2.3%). Another 6.4% were of other EU background, while the remaining 6.1% were of other non-EU, but largely other European, background.