Calculate and Sort by Age in BirthDate column in SQL Server

Hi! I have table Information.

ID        Surname                   Name                  Birthday

1         Pulodov                    Rustam               22.12.987

2         Asrori                       Yatim                  06.02.1978

3         Sharipov                   Sadriddin             08.12.1991

4         Sayfurov                    Karomatullo         07.05.1980

I want this answer: 

ID    Surname           Name               Birthday          Age

1      Sharipov          Sadriddin          08.12.1991        24

2      Pulodov            Rustam            22.12.987         27

3      Sayfurov          Karomatullo       07.05.1980       35

4      Asrori              Yatim               06.02.1978        37

 I use this query, but not work.

SELECT Surname,Name,Birthday FLOOR((CAST(GETDATE() AS INTEGER)-CAST(Birthday AS INTEGER))/365.25) AS AGE FROM Information ORDER BY AGE ASC

How I can solve this? Please!!!