ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<div id="container" style="height: 400px"></div>

JavaScript

var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        type: 'column',
        events: {
            load: function(){
                var chart = this;
                
                chart.moveDataLabels = function(series){
                    $.each(series.data, function(i, point){
                        point.dataLabel.translate(0, point.barH);
                    });
                }
                chart.moveDataLabels(chart.series[0]);
            }
        }
    },
    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 
                     'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], 
        labels: {
            rotation: 45, 
            align: 'right',
        }
    },
    
    plotOptions: {
        series: {
            dataLabels: {
                enabled: true,
                rotation: -90,
                color: '#fff',
                x: 3,
                y: -18
            }
        }
    },
    
    series: [{
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]        
    }]
});