CREATE TABLE table_204_442 (id DECIMAL, "institution" TEXT, "location" TEXT, "enrollment" DECIMAL, "nickname" TEXT, "varsity\ sports" DECIMAL, "rugby\ since" TEXT, "head coach" TEXT)

which institution has the highest amount of enrollment ?
SELECT "institution" FROM table_204_442 ORDER BY "enrollment" DESC LIMIT 1
SELECT "institution" FROM "table_204_442" ORDER BY "enrollment" DESC NULLS LAST LIMIT 1