13 municipalities with German minority constituting 10% of population, which qualifies for such provisions. There is no bilingual education system in Western and Northern Bohemia, where the German minority is mostly concentrated. However, this is in large part due to the absence of German-speaking youth, a heritage of the post-war policy of the Communist government. According to the 2001 census there remain 13 municipalities and settlements in the Czech Republic with more than 10% Germans. Many representatives of expellees' organizations support the erection of bilingual signs in all formerly German-speaking territory as a visible sign of the bilingual linguistic and cultural heritage of the region, but their efforts are not supported by some of the current inhabitants, as the vast majority of the current population is not of German descent. The German-Czech Declaration of 21 January 1997 covered the two most critical issues—the role of some Sudeten Germans in the breakup of Czechoslovakia in 1938 and their expulsion after World War II. Greeks Another influential minority are Greeks. Large numbers of Greeks arrived in Czechoslovakia during the end of the Greek Civil War. The first transports of Greek children arrived in 1948 and 1949. Later, more transports, also including adults, arrived. They were partly leftists, communists and guerillas with their relatives, hence the willingness of Czechoslovak government to allow the immigration. This was viewed rather as a temporary solution. After the defeat of DSE and other left-wing guerillas, the Greeks stayed in Czechoslovakia. In total more than 12,000 Greeks immigrated to Czechoslovakia between 1948 and 1950. Today, there are about 7000 Greeks in the country (3219 according to 2001 census data), mostly in the 3 biggest towns – Prague, Brno, Ostrava – and also in Bohumín, Havířov, Jeseník, Karviná, Krnov, Šumperk, Třinec, Vrbno pod Pradědem and Žamberk (apart from the last one these towns are in Silesia). Poles The most concentrated linguistic minority in the Czech Republic are ethnic Poles, historically the plurality, today constituting about 10% of the population of Karviná and Frýdek-Místek districts. Poles have the right to use their language in official dealings; the public media (Czech TV and Czech Radio) regularly broadcast in Polish; and there are many Polish primary and secondary schools in the area. The Polish minority has been decreasing substantially since World War II as education in Polish was difficult to obtain, while Czech authorities did not permit bilingual signs to maintain Polish