Twitter Bootstrap: Center Text on Progress Bar

I've been using Twitter's bootstrap and I would like the text on the progress bar to be centered on the on bar regardless of value.

The below link is what I have now. I would like all text to be aligned with the bottom most bar.

Screenshot:

progress bar

I've tried my best with pure CSS and I'm trying to avoid using JS if possible but I'm willing to accept it if it's the cleanest way to do it.

<div class="progress">
<div class="bar" style="width: 86%">517/600</div>
</div>
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Bootstrap 5: (Same as v4x)

<div class="progress position-relative">
<div class="progress-bar" role="progressbar" style="width: 60%" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"></div>
<small class="justify-content-center d-flex position-absolute w-100">60% complete</small>
</div>

Bootstrap 4 with utility classes: (Thanks to MaPePeR for the addition)

<div class="progress position-relative">
<div class="progress-bar" role="progressbar" style="width: 60%" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"></div>
<small class="justify-content-center d-flex position-absolute w-100">60% complete</small>
</div>

Bootstrap 3:

Bootstrap now supports text within a span element in the Progress bar. HTML as provided in Bootstrap's example. (Notice the class sr-onlyis removed)

HTML:

<div class="progress">
<div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
<span>60% Complete</span>
</div>
</div>

... It does however only center the text according to the bar itself, so we need a little bit of custom CSS.

Paste this in another stylesheet/below where you load bootstrap's css:

CSS:

/**
* Progress bars with centered text
*/


.progress {
position: relative;
}


.progress span {
position: absolute;
display: block;
width: 100%;
color: black;
}

JsBin file: http://jsbin.com/IBOwEPog/1/edit


Bootstrap 2:

Paste this in another stylesheet/below where you load Bootstrap's CSS:

/**
* Progress bars with centered text
*/
.progress {
position: relative;
}


.progress .bar {
z-index: 1;
position: absolute;
}


.progress span {
position: absolute;
top: 0;
z-index: 2;
color: black; /* Change according to needs */
text-align: center;
width: 100%;
}

Then add text to a progress bar by adding a span element outside .bar:

<div class="progress">
<div class="bar" style="width: 50%"></div>
<span>Add your text here</span>
</div>

JsBin: http://jsbin.com/apufux/2/edit

Bootstrap 3 answer, as shown in bootstrap example

<div class="progress text-center">
<div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
<span>60% Complete</span>
</div>
<span>40% Left</span>
</div>