CREATE TABLE table_20507 ("Region of USSR" TEXT, "Number of families" FLOAT, "Number of people" FLOAT, "Average family size" TEXT, "% of total deportees" TEXT)

What regions of the USSR have a percentage of deportees of 10.6?
SELECT "Region of USSR" FROM table_20507 WHERE "% of total deportees" = '10.6'
SELECT "Region of USSR" FROM "table_20507" WHERE "% of total deportees" = '10.6'