Question: How many years was the operating profit (s$m) 717.1?
Schema: create table table_161591_2 (profit_before_taxation__s varchar, operating_profit__s$m_ varchar, PRIMARY KEY (profit_before_taxation__s))
SQL: select count(profit_before_taxation__s) as $m_ from table_161591_2 where operating_profit__s$m_ = "717.1"