PHP MYSQL Detect if new row is added

PHP MYSQL Detect if new row is added

Any Idea how can I identify if there is new client added on my database.
I was thinking about identifying it thru date_added field.
id client_name date_added
---------------------------------
1 ABC 2013-01-02
2 XYZ 2013-01-03
3 EFG 2013-01-02
4 HIJ 2013-01-05
as you can see a new client added HIJ on 2013-01-05.
I was looking with this kind of result:
Client List
Total NO: 4
New Client
Total No: 1
Client Name: HIJ