High chart rotated label column chart

HTML

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

<div id="container" style="min-width: 500px; height: 400px; margin: 0 auto"></div>

JavaScript

$(function () {
        $('#container').highcharts({
            chart: {
                type: 'column',
                margin: [ 50, 50, 100, 80]
            },
            title: {
                text: 'World\'s largest cities per 2008'
            },
            xAxis: {
                categories: [
                    'Tokyo',
                    'Jakarta',
                    'New York',
                    'Seoul',
                    'Manila',
                    'Mumbai',
                    'Sao Paulo',
                    'Mexico City',
                    'Dehli',
                    'Osaka',
                    'Cairo',
                    'Kolkata',
                    'Los Angeles',
                    'Shanghai',
                    'Moscow',
                    'Beijing',
                    'Buenos Aires',
                    'Guangzhou',
                    'Shenzhen',
                    'Istanbul'
                ],
                labels: {
                    rotation: -45,
                    align: 'right',
                    style: {
                        fontSize: '13px',
                        fontFamily: 'Verdana, sans-serif'
                    }
                }
            },
            yAxis: {
                min: 0,
                title: {
                    text: 'Population (millions)'
                }
            },
            legend: {
                enabled: false
            },
            tooltip: {
                pointFormat: 'Population in 2008: <b>{point.y:.1f} millions</b>',
            },
            series: [{
                name: 'Population',
                data: [34.4, 21.8, 20.1, 20, 19.6, 19.5, 19.1, 18.4, 18,
                    17.3, 16.8, 15, 14.7, 14.5, 13.3, 12.8, 12.4, 11.8,
                    11.7, 11.2],
                dataLabels: {
                    enabled: true,
                    rotation: -90,
                    color: '#FFFFFF',
                    align: 'right',
          ...