Creating advanced healthbar

I want to create a healthbar. Now I have one, but it consist of some images (for health = 0%, 10%, 20% … etc.).

Is it any way to create it using new Unity’s UI, when it changes not only for each 10%, like in my case, but each 1%?
I need something like progressbar.

You can use some animations for this.
Look at this video to get you on the way Unity3D 4.6 UI: Health Bar tutorial - YouTube