Write SQL query to solve given problem: From 1960 to 1965, which country has the lowest value of indicator belongs to Health: Population: Structure?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CountryName FROM Indicators WHERE Value = ( SELECT MIN(T1.Value) FROM Indicators AS T1 INNER JOIN Series AS T2 ON T1.IndicatorName = T2.IndicatorName WHERE T1.Year >= 1960 AND T1.Year < 1966 AND T2.Topic = 'Health: Population: Structure' )