Android : Database sqlite android rewrite

In my android app, i create a sqlite database in onCreate() method and it is filled with informations that i get from a csv file on my server.

My problem is that everytime the app is launched, my db is filled with same information once again (so if the app is launched 3 times i will have my db filled 3 times with same data).

First launch:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0

Second:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0

Third:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0
3           Paul        32          California  20000.0
4           Allen       25          Texas       15000.0
5           Paul        32          California  20000.0
6           Allen       25          Texas       15000.0

How can i handle this situation? I would like that my db would be filled only if data in csv are not in the db.

Any idea?