statistics on Albanians in Greece vary. There was a drop in the number of registered Albanian immigrants in 2012, suggesting that approximately 130,000 Albanian migrants have lost their stay permits and thereby making 29% of the Albanian immigrant population in Greece irregular. After 1991, at least 500,000 Albanians have migrated and relocated to Greece. Despite the a lack of exact statistics, it is estimated that at least 700,000 Albanians have moved to Greece during the last 25 years. The Albanian government estimates 500,000 Albanians in Greece at the very least, and that is excluding their children. A 2011 census indicated that Albanians consisted the biggest group of foreigners in Greece, with roughly 480,000, but taking into consideration the current population of Greece (11 million) and the fact that the census failed to account for illegal foreigners, it was estimated that Albanians consist of 5% of the population (at least 550,000). Albanians in Greece have a long history of Hellenisation, assimilation and integration.Lazaridis, Gabriella, and Iordanis Psimmenos. "Migrant flows from Albania to Greece: economic, social and spatial exclusion." In Eldorado or Fortress? Migration in Southern Europe, pp. 170-185. Palgrave Macmillan, London, 2000. Many ethnic Albanians have been naturalised as Greek nationals, others have self-declared as Greek since arrival and a considerable number live and work across both countries seasonally hence the number of Albanians in the country has often fluctuated. Diaspora Diaspora based Albanians may self identify as Albanian, use hybrid identification or identify with their nationality, often creating an obstacle in establishing a total figure of the population. Europe During the end of the 20th and the beginning of the 21st centuries, the conflicts in the Balkans and the Kosovo War set in motion large population movements of Albanians to Central, Western and Northern Europe. The gradual collapse of communism in Albania triggered as well a new wave of migration and contributed to the emergence of a new diaspora, mainly in Southern Europe, in such countries as Greece and Italy. In Central Europe, there are approximately 200,000 Albanians in Switzerland with the particular concentration in the cantons of Zürich, Basel, Lucerne, Bern and St. Gallen. The neighbouring Germany is home to around 250,000 to 300,000 Albanians while in Austria there are around 40,000 to 80,000 Albanians concentrated in the states of Vienna, Styria, Salzburg, Lower and Upper Austria. In Western Europe, the Albanian population of approximately 10,000 people living in