CREATE TABLE table_16989 ("Institution" CLOB, "Location" CLOB, "Founded" FLOAT, "Type" CLOB, "Enrollment" FLOAT, "Joined" CLOB, "Nickname" CLOB)

What is the minimum enrollment at barton college
SELECT MIN("Enrollment") FROM table_16989 WHERE "Institution" = 'Barton College'
SELECT MIN("Enrollment") FROM "table_16989" WHERE "Institution" = 'Barton College'