CREATE TABLE table_18762 ("Season" CLOB, "Timeslot" CLOB, "Season Premiere" CLOB, "Season Finale" CLOB, "Episodes" FLOAT, "TV Season" CLOB, "Ranking" CLOB, "Viewers  ( in millions ) " CLOB)

How many rankings did the 5th season have?
SELECT COUNT("Ranking") FROM table_18762 WHERE "Season" = '5th'
SELECT COUNT("Ranking") FROM "table_18762" WHERE "Season" = '5th'