CREATE TABLE table_18972 ("High School" TEXT, "Location" TEXT, "Founded" FLOAT, "Affiliation" TEXT, "Enrollment" FLOAT, "Nickname" TEXT, "Division" TEXT)

How many enrollment figures are provided for Roosevelt High School?
SELECT COUNT("Enrollment") FROM table_18972 WHERE "High School" = 'Roosevelt'
SELECT COUNT("Enrollment") FROM "table_18972" WHERE "High School" = 'Roosevelt'