Depends on many things
For instance, live in a big house with big bills? Want to go on nice foreign holidays? Want to play golf or have any other expensive hobby?
Also, you need more when you first retire but as you get to a certain age your requirements (for most people) will drop dramatically.
11K ? If you have some life savings to help top up the initial years it may be enough but if not it is not going to be a pleasant retirement.