How often do you create backup for your blog??

[mrb.frequency]

I was just wondering that how often does webmasters creates backup for their blog? I mean now-a-days its pretty often that blogs get hacked or any kind of server related problem creates loosing of data.

[brian]

Usually my all sites get backed up every after 3 days later. Although, I backup each of my blog after every update I post.

[ksmith29]

Its an obvious thing for me to create a backup file after each update in my blogs.

[lazylord]

I do backup once in a month.