Austrians are a homogeneous people; 91% are native German speakers. However, there has been a significant amount of immigrants, particularly from former Yugoslavia and Turkey, over the last two decades. Only two numerically significant autochthonous minority groups exist--18,000 Slovenes in [[Carinthia]] (south central Austria) and about 19,400 Croats in Burgenland (on the Hungarian border). The Slovenes form a closely-knit community. Their rights as well as those of the Croats are protected by law and generally respected in practice. Some Austrians, particularly near Vienna, still have relatives in the Czech Republic, Slovakia, and Hungary. About 74% of all Austrians are Roman Catholic. The church abstains from political activity. Small Lutheran minorities are located mainly in Vienna, Carinthia, and Burgenland. Small Islamic (immigrant) communities have arisen in Vienna and Vorarlberg .