How many members did Africa have the year that Australia had 94615?
CREATE TABLE "chronology_of_worldwide_membership" (
  "year" real,
  "worldwide" real,
  "africa" real,
  "america" real,
  "asia" real,
  "australia" real,
  "europe" real
);
SELECT "africa" FROM "chronology_of_worldwide_membership" WHERE "australia"=94615;