Write SQL query to solve given problem: What was the deposit interest rate in the Commonwealth of Australia in 1979 in percentage?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.Value FROM Indicators AS T1 INNER JOIN Country AS T2 ON T1.CountryCode = T2.CountryCode WHERE T2.LongName = 'Commonwealth of Australia' AND T1.IndicatorName = 'Deposit interest rate (%)' AND T1.Year = 1979