CREATE TABLE table_74342 ("LGA Name" CLOB, "Area  ( km 2  ) " FLOAT, "Census 2006 population" FLOAT, "Administrative capital" CLOB, "Postal Code" FLOAT)

What is the 2006 census population when the area is 159?
SELECT COUNT("Census 2006 population") FROM table_74342 WHERE "Area (km 2 )" = '159'
SELECT COUNT("Census 2006 population") FROM "table_74342" WHERE "Area (km 2 )" = '159'