amcharts Column 3D stacked

HTML

<script src="http://www.amcharts.com/lib/amcharts.js" type="text/javascript"></script>
<div id="chartdiv" style="width: 100%; height: 362px;"></div>

JavaScript

var chart;

var chartData = [{
    country: "USA",
    year2004: 3.5,
    year2005: 4.2},
{
    country: "UK",
    year2004: 1.7,
    year2005: 3.1},
{
    country: "Canada",
    year2004: 2.8,
    year2005: 2.9},
{
    country: "Japan",
    year2004: 2.6,
    year2005: 2.3},
{
    country: "France",
    year2004: 1.4,
    year2005: 2.1},
{
    country: "Brazil",
    year2004: 2.6,
    year2005: 4.9},
{
    country: "Russia",
    year2004: 6.4,
    year2005: 7.2},
{
    country: "India",
    year2004: 8.0,
    year2005: 7.1},
{
    country: "China",
    year2004: 9.9,
    year2005: 10.1},
{
    country: "USA",
    year2004: 3.5,
    year2005: 4.2},
{
    country: "UK",
    year2004: 1.7,
    year2005: 3.1},
{
    country: "Canada",
    year2004: 2.8,
    year2005: 2.9},
{
    country: "Japan",
    year2004: 2.6,
    year2005: 2.3},
{
    country: "France",
    year2004: 1.4,
    year2005: 2.1},
{
    country: "Brazil",
    year2004: 2.6,
    year2005: 4.9},
{
    country: "Russia",
    year2004: 6.4,
    year2005: 7.2},
{
    country: "India",
    year2004: 8.0,
    year2005: 7.1},
{
    country: "China",
    year2004: 9.9,
    year2005: 10.1}];


AmCharts.ready(function() {
    // SERIAL CHART
    chart = new AmCharts.AmSerialChart();
    chart.dataProvider = chartData;
    chart.categoryField = "country";
    chart.fontSize = 14;
    chart.startDuration = 1;
    chart.plotAreaFillAlphas = 0.2;
    // the following two lines makes chart 3D
    chart.angle = 30;
    chart.depth3D = 40;

    // AXES
    // category
    var categoryAxis = chart.categoryAxis;
    categoryAxis.gridAlpha = 0.2;
    categoryAxis.gridPosition = "start";
    categoryAxis.axisColor = "#DADADA";
    categoryAxis.axisAlpha = 1;
    categoryAxis.dashLength = 5;

    // value
    var valueAxis = new AmCharts.ValueAxis();
    valueAxis.stackType = "3d"; // This line makes chart 3D stacked (columns are placed one behind another)
    valueAxis.gridAlpha = 0.2;
    valueAxis.axisColor =...