Write SQL query to solve given problem: What is the average adolescent fertility rate of the country whose Alpha2Code is 1A over the years this indicator was calculated.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT AVG(T2.Value) FROM Country AS T1 INNER JOIN Indicators AS T2 ON T1.CountryCode = T2.Countrycode WHERE T1.Alpha2Code = '1A' AND T2.IndicatorName LIKE 'adolescent fertility rate%'