I've been trying to display the percentage on a [NVD3 Pie Chart](http://nvd3.org/ghpages/pie.html) but I don't see how to do it... I'm looking for something like [this](http://support.google.com/drive/bin/answer.py?hl=en&answer=190726) 

First of all, is there a graph option or a way to display something **inside** each part of the Pie Chart? If yes, is there an option to display a percentage instead of the exact values? 

Thanks and enjoy your weekend!