The Alps traverse Austria from west to east and occupy three fourths of the country. The highest peak in Austria is the Grossglockner (12,460 ft/3,798 m) in the Hohe Tauern group. The scenic beauty of Tyrol, the Salzkammergut, Innsbruck, the Austrian Alps, Kärnten, and Salzburg city, and the attractions of Vienna and other cultural centers have made Austria a major European tourist center. The country is drained by the Danube River and its tributaries, the Inn, the Enns, the Mürz, and the Mur. Its nine provinces (Ger. Bundesländer) are Vorarlberg, Tyrol, Salzburg, Carinthia, Styria, Upper Austria, Lower Austria, Burgenland, and Vienna. German-speaking, over 99% of Austrians are of Germanic ethnic origin, and some 78% are Roman Catholics. Since 1945, Austria has received nearly 2 million refugees from elsewhere in Europe, though many of these continued on to other destinations. In 1996 about 300,000 of the nation's workforce were foreign laborers. There are universities in Vienna, Salzburg, Innsbruck, Graz, Klagenfurt, Leoben, and Krems an der Donau.