CREATE TABLE table_36657 ("Pos. in 2007" TEXT, "Club" TEXT, "City" TEXT, "Best Position" TEXT, "Seasons in league" FLOAT)

Which sum of Seasons in league has a Best Position of 5th (2007)?
SELECT SUM("Seasons in league") FROM table_36657 WHERE "Best Position" = '5th (2007)'
SELECT SUM("Seasons in league") FROM "table_36657" WHERE "Best Position" = '5th (2007)'