My SQL server showing different result with same query execution at different time

Question

When I execute below query from MySQL server, it shows me different output for each time even though database is stable and not used by anyone except me.

SELECT TABLE_NAME , table_rows
FROM information_schema.tables 
WHERE table_schema='DBNAME' 
AND TABLE_TYPE != 'VIEW'

MySQL Server Version: 5.1

I am quite confused with this behaviour.