jqPlot show percent and value on pie chart
===

I'm using jqPlot with jqplot.PieRenderer to try and display a pie chart. On the label I'd like to show `value (percent)`. The documentation says you can pass `dataLabel` an array of label types [(source)](http://www.jqplot.com/docs/files/plugins/jqplot-pieRenderer-js.html#$.jqplot.PieRenderer.dataLabels), however, putting `%d%%` (for percent) and `%d` (for value) in the `dataLabelFormatString` option end up showing nothing.

Any ideas here?

    { 
        seriesDefaults: {
            renderer: jQuery.jqplot.PieRenderer, 
            rendererOptions: {
                showDataLabels: true,
                dataLabels: ['value', 'percent'],
                dataLabelFormatString: "%d %d%%",
                sliceMargin: 4,
                fill: false
            }
        }, 
        legend: { show:true, location: 'e' }
    }