CREATE TABLE table_33759 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the average crowd size when the home team scores 16.9 (105)?
SELECT AVG("Crowd") FROM table_33759 WHERE "Home team score" = '16.9 (105)'
SELECT AVG("Crowd") FROM "table_33759" WHERE "Home team score" = '16.9 (105)'