5.1 million or 38% of the population were Polish by ethnicity (wrote Elżbieta Trela-Mazur),[13] with 37% Ukrainians, 14.5% Belarusians, 8.4% Jews, 0.9% Russians and 0.6% Germans.[13] There were also 336,000 refugees from areas occupied by Germany, most of them Jews (198,000).[13] All Polish territories occupied by USSR were annexed to the Soviet Union with the exception of the area of Wilno, which was transferred to Lithuania.