CREATE TABLE table_20572 ("Year ended" TEXT, "Revenue  ( S$m ) " TEXT, "Expenditure  ( S$m ) " TEXT, "Operating profit  ( S$m ) " TEXT, "Profit before taxation  ( S$m ) " TEXT, "Profit attributable to equity holders  ( S$m ) " TEXT, "EPS after tax \\u2013 diluted  ( cents ) " TEXT)

How many years was the operating profit (s$m) 717.1?
SELECT COUNT("Profit before taxation (S$m)") FROM table_20572 WHERE "Operating profit (S$m)" = '717.1'
SELECT COUNT("Profit before taxation (S$m)") FROM "table_20572" WHERE "Operating profit (S$m)" = '717.1'