How many Jews were forced out of their jobs by the Nazis?

By about late 1939 very few Jews in Germany or Austria had jobs any more and those who did (for example, in the professions) were only allowed to work for other Jews. In mid 1939 Heydrich wrote to Himmler suggesting that an official list of occupations be drawn up that Jews were allowed to do, as he feared that otherwise they would become a burden on the "public purse". Himmler replied telling him not to worry about it ...