Missing datalabel

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

JavaScript

$(function () {
    $('#container').highcharts({
        chart: {
            type: 'column'
        },
        xAxis: {
            categories: ['Jan', 'Feb']
        },
            yAxis: {
	        max: 100
	    },
        plotOptions: {
            series: {
                stacking: 'normal',
                       dataLabels: {
                           enabled: true 
                  }
            }
        },
        
        series: [{
            data: [70.001,40]
        }, {
            data: [30, 1]
        }],

        tooltip: {
            pointFormat: '{series.name}: <b>{point.y}</b> ({point.percentage:.1f}%)<br/>'
        }
    });
});