V3: Column 3D stacked

HTML

<script src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="http://www.amcharts.com/lib/3/serial.js"></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,
        "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 = "#DADADA";
    valueAxis.axisAlpha = 1;
    valueAxis.dashLength = 5;
    valueAxis.unit = "%";
    chart.addValueAxis(valueAxis);

    // GRAPHS         
    // first graph
    var graph1 = new AmCharts.AmGraph();
    graph1.title = "2004";
    graph1.valueField = "year2004";
    graph1.type = "column";
    graph1.lineAlpha = 0;
...