Stacking charts with multiple series

By stacking the area charts, one can easily compare the series in a proportional or total format. Stacking can be applied to all or some of the series in the charts.

Consider the following data of the past 4 years showing the production of iron ore by major mining countries:

(function() {
  $( '#chart_container' ).highcharts({
    chart: {
      type: 'area'
    },
    title: {
      text: 'Iron Ore Production'
    },
    xAxis: {
      tickmarkPlacement: 'on',
      categories: [2010, 2011, 2012, 2013]
    },
    yAxis: {
      title: {
        text: 'in million metric tons'
      }
    },
    series: [{
      name: 'China',
      data: [1070, 1330, 1310, 1320]
    }, {
      name: 'Australia',
      data: [433, 488, 521, 530]
    }, {
      name: 'Brazil',
      data: [370, 373, 398, 398]
    }, {
      name: 'India',
      data: [230, 240, 144, 150]
    }, {
 ...