V3: Pie simple

HTML

<script src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="http://www.amcharts.com/lib/3/pie.js"></script>
<div id="chartdiv" style="width: 100%; height: 362px;"></div>

JavaScript

var chart;
var legend;

var chartData = [
    {
        "country": "Czech Republic",
        "litres": 301.9
    },
    {
        "country": "Ireland",
        "litres": 201.1
    },
    {
        "country": "Germany",
        "litres": 165.8
    },
    {
        "country": "Australia",
        "litres": 139.9
    },
    {
        "country": "Austria",
        "litres": 128.3
    },
    {
        "country": "UK",
        "litres": 99
    },
    {
        "country": "Belgium",
        "litres": 60
    }
];

AmCharts.ready(function () {
    // PIE CHART
    chart = new AmCharts.AmPieChart();
    chart.dataProvider = chartData;
    chart.titleField = "country";
    chart.valueField = "litres";
    chart.outlineColor = "#FFFFFF";
    chart.outlineAlpha = 0.8;
    chart.outlineThickness = 2;
    chart.balloonText = "[[title]]<br><span style='font-size:14px'><b>[[value]]</b> ([[percents]]%)</span>";
    
    // WRITE
    chart.write("chartdiv");
});