 Estimates of their number vary significantly; the official figures show 24,706 Slovenian speakers in Friuli-Venezia Giulia, as per the 1971 Census, but Slovenian estimates speak of 83,000 to 100,000 people.The Slovene minority in Italy enjoys legal protection of its collective rights, guaranteed by the Italian constitution and specific legislation, as well as by international treaties (especially the London Memorandum of 1954), and bilateral agreements initially stipulated first between Italy and Yugoslavia (especially the Treaty of Osimo of 1975), and since 1991 between Italy and Slovenia.Since 1945, the Slovenes in Italy have enjoyed partial cultural autonomy, including an education system in Slovene.