CREATE TABLE table_72914 ("Country" TEXT, "Preliminary" TEXT, "Interview" TEXT, "Swimsuit" TEXT, "Evening Gown" TEXT, "Average" TEXT)

What was the average score for the country with the evening gown score of 9.100?
SELECT COUNT("Average") FROM table_72914 WHERE "Evening Gown" = '9.100'
SELECT COUNT("Average") FROM "table_72914" WHERE "Evening Gown" = '9.100'