CREATE TABLE table_74428 ("Date" TEXT, "Episode" FLOAT, "Official rating 4+" TEXT, "Share 4+" TEXT, "Official rating 16-39" TEXT, "Share 16-39" TEXT)

what is the official rating 16-39 for the episode with a 16-39 share of 22,77%?
SELECT "Official rating 16-39" FROM table_74428 WHERE "Share 16-39" = '22,77%'
SELECT "Official rating 16-39" FROM "table_74428" WHERE "Share 16-39" = '22,77%'