Australia The data refers to the grant by country of previous nationality. Source 2005-2016: Department of Immigration and Border Proteccion. LINK Department of Immigration and Citizenship, Departmental Annual Reports
Austria The data refer to foreigners residing in Austria in the year in which they acquired their nationality. Source 2000-2016: Statistik Austria. LINK Statistics Austria, Naturalisations
Belgium All types of nationality acquisition. It includes foreigners who were resident in Belgium in the year in which they acquired their nationality. Source 2000-2015: OECD, International Migration Database, based on data from Belgium National Statistical Office and Ministry of Justice. LINK OCDE, Demography and Population – International Migration Database and Eurostat, Acquisition of citizenship by sex, age group and former citizenship (from 2010)
Canada All types of acquisition. Data refers to country of birth, not to country of previous nationality. Persons who acquire Canadian citizenship may also hold other citizenships at the same time if allowed by the country of previous nationality. Application for citizenship can only be made by a permanent resident after living in Canada for at least three years (1,095 days) in the four years immediately preceding the apply date. Source 2000-2015: OECD, International Migration Database, based on data from Citizenship and Immigration Canada. LINK OCDE, Data by Theme, Demography and Population – Migration Statistics, International Migration Database
Denmark Source 2000-2016: Denmark Statistik. LINK Denmark Statistik
France All types of nationality acquisition: naturalization, marriage, declaration or the reaching of the age of majority. The data refers to the grant by country of previous nationality. Source 2000-2016: Ministère de L'Intérieure: immigration, intégration, asile et le dévelopment solidaire. LINK Ministère de L'Intérieure; LINK Insee
Germany Source 2001-20016: OECD, International Migration Database, based on data from Statistisches Bundesamt Deutshland. Fonte 2000 e 2003-2014: Statistisches Bundesamt Deutschland, Einbürgerungen, Fachserie 1 Reihe 2.1, 2016, tabelle 3b. LINK OECD International Migration Database; LINK Statistisches Bundesamt Deutschland
Ireland Source 2005-2015: OECD, International Migration Database, based on the Department of Justice and Equality. LINK Eurostat, Immigration by five year age group, sex and citizenship
Italy Source 2003-2015: Eurostat, Statistics Database: population and social conditions, acquisition of citizenship by sex, age group and former citizenship. LINK Eurostat, Statistics Database
Luxembourg All types of acquisition excluding those of children acquiring nationality as a consequence of the naturalisation of their parents. Source 2000-2016: Ministère de la Justice: chiffres clés statistiques en matière d'indigénat. LINK Ministère de la Justice, Chiffres clés
Netherlands Acquisition of Dutch citizenship other than by birth. Dutch citizenship can be obtained by law (including by adoption), by option, by naturalization (independent or co naturalization) and by recognition. Source 2000-2016: Centraal Bureau voor de Statistiek: statline database (Nationaliteitswijzigingen; geslacht, nationaliteit en regeling). LINK Centraal Bureau voor de Statistiek
Norway Source 2000-2016: Statistics Norway: naturalizations by sex, age and earlier citizenship, 1977-2016. LINK Statistics Norway
Spain Includes only acquisitions on grounds of residence in Spain. Data corresponds to acquisition of citizenship whose resolution depends on the Dirección General de los Registros y del Notariado, Ministerio de Justicia. Source 2000-2016: Observatorio Permanente de la Inmigració: concesiones de nacionalidad española por residencia. LINK Secretaría General de Inmigración y Emigración, Concesiones de nacionalidad española por residencia
Sweden Source 2000-2016: Statistics Sweden. LINK Statistics Sweden
Switzerland Source 2000-2016: Office Fédéral de la Statistique: acquisition de la nationalité suisse selon la nationalité antérieure 1981-2016. LINK Office Fédéral de la Statistique LINK acquisition de la nationalité suisse selon la nationalité antérieure 1981-2016
United Kingdom Source 2000-2003: OECD, International Migration Database, dados baseados no Government UK, Home Office. Source 2004-2016: Government UK, Home Office: immigration statistics, July to September 2014, citizenship grants by previous country of nationality. LINK OECD, International Migration Database; LINK Gov UK, Immigration Statistics January to March 2017
United States The conferring, by any means, of citizenship upon a person after birth. Data refers to the fiscal year ending on September 30th of each (calendar) year indicated and starting on October 1st of the previous year. Source 2000-2016: US Department of Homeland Security: Yearbook of Immigration Statistics 2004, table 32, persons naturalized by region and country of birth, fiscal years 1986-2004 (2001-2002); Yearbook of Immigration Statistics 2016, table 21, persons naturalized by region and country of birth, fiscal years 2004 to 2016 (2003-2016). LINK US Department of Homeland Security
