CREATE TABLE table_62931 ("Campus" TEXT, "Year opened" TEXT, "Students" TEXT, "Size" TEXT, "Location" TEXT)

What location was the campus opened in 2005 with students listed as na?
SELECT "Location" FROM table_62931 WHERE "Students" = 'na' AND "Year opened" = '2005'
SELECT "Location" FROM "table_62931" WHERE "Students" = 'na' AND "Year opened" = '2005'