Jewish population in particular. Rich bankers, factory owners, lower middle class artisans and poor factory workers did not mingle easily. In 1926, there were 50,761 Jewish families living in Budapest. Of that number, 65% lived in apartments that contained one or two rooms, 30% had three or four rooms, while 5% lived in apartments with more than 4 rooms. Education. The following chart illustrates the effect of the 1920 "numerus clausus" Law on the percentage of Jewish university students at two Budapest Universities. Those who could afford went to study to other European countries like Austria, Germany, Italy and Czechoslovakia. In 1930, of all males aged six and older, Seven of the thirteen Nobel prize winners born in Hungary are Jewish. In sports, 55.6% of the individual gold medal winners of Hungary at the Summer Olympic Games between 1896 and 1912 were Jewish. This number dropped to 17.6% in the interwar period of 1924–1936. Revolution More than 10,000 Jews died and thousands were wounded and disabled fighting for Hungary in World War I. But these sacrifices by patriotic Hungarian Jews may have been outweighed by the chaotic events following the war's end. With the defeat and dissolution of the Austro-Hungarian Empire, Hungary would be forced by the Allies to adhere to the Treaty of Trianon, which ceded to neighboring nations fully two-thirds of Hungary's imperial territory and two-thirds of its population, including a third of its ethnically Magyar citizens and many Jews. These losses provoked deep anger and hostility in the remaining Hungarian population. The first post-war government was led by Mihály Károlyi, and was the first modern effort at liberal democratic government in Hungary. But it was cut short in a spasm of communist revolution, which would have serious implications for the manner in which Hungarian Jews were viewed by their fellow-countrymen. In March 1919, Communist and Social Democrat members of a coalition government ousted Karolyi; soon after (March 21), the Communists were to take power as their Social Democrat colleagues were willing neither to accept nor to refuse the Vix Note to cede a significant part of the Great Plains to Romania and the communists took control of Hungary's governing institutions. While popular at first among Budapest's progressive elite and proletariat, the so-called Hungarian Soviet Republic fared poorly in almost all of its aims, particularly its efforts to regain territories occupied by Slovakia (although achieving some transitional success