CREATE TABLE table_29804176_23 (official_rating_16_39 VARCHAR(255), share_16_39 VARCHAR(255))
what is the official rating 16-39 for the episode with  a 16-39 share of 22,77%?
    
SQL: SELECT official_rating_16_39 FROM table_29804176_23 WHERE share_16_39 = "22,77%"