Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_77661 ( "Rank by average" real, "Place" real, "Couple" text, "Total" real, "Number of dances" real, "Average" real )

### Question ###
What is the average when the rank by average is more than 12?

### Accurate SQL ###

SELECT SUM("Average") FROM table_77661 WHERE "Rank by average" > '12'