CREATE TABLE table_3529 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Nickname" TEXT, "Joined" TEXT)

What is every year for joined with the Ravens nickname?
SELECT "Joined" FROM table_3529 WHERE "Nickname" = 'Ravens'
SELECT "Joined" FROM "table_3529" WHERE "Nickname" = 'Ravens'