Using "categoryAxis.totalText" to display total value on a stacked chart

HTML

<script type="text/javascript" src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/serial.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/none.js"></script>
<div id="chartdiv"></div>

CSS

#chartdiv {
	width		: 100%;
	height		: 500px;
	font-size	: 11px;
}

JavaScript

var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
	"theme": "none",
    "legend": {
        "horizontalGap": 10,
        "maxColumns": 1,
        "position": "right",
		"useGraphSettings": true,
		"markerSize": 10
    },
    "dataProvider": [{
        "year": 2003,
        "europe": 2.5,
        "namerica": 2.5,
        "asia": 2.1,
        "lamerica": 0.3,
        "meast": 0.2,
        "africa": 0.1
    }, {
        "year": 2004,
        "europe": 2.6,
        "namerica": 2.7,
        "asia": 2.2,
        "lamerica": 0.3,
        "meast": 0.3,
        "africa": 0.1
    }, {
        "year": 2005,
        "europe": 2.8,
        "namerica": 2.9,
        "asia": 2.4,
        "lamerica": 0.3,
        "meast": 0.3,
        "africa": 0.1
    }],
    "valueAxes": [{
        "stackType": "regular",
        "axisAlpha": 0.3,
        "gridAlpha": 0,
        "totalText": "[[total]]"
    }],
    "graphs": [{
        "balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
        "fillAlphas": 0.8,
        "labelText": "[[value]]",
        "lineAlpha": 0.3,
        "title": "Europe",
        "type": "column",
		"color": "#000000",
        "valueField": "europe"
    }, {
        "balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
        "fillAlphas": 0.8,
        "labelText": "[[value]]",
        "lineAlpha": 0.3,
        "title": "North America",
        "type": "column",
		"color": "#000000",
        "valueField": "namerica"
    }, {
        "balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
        "fillAlphas": 0.8,
        "labelText": "[[value]]",
        "lineAlpha": 0.3,
        "title": "Asia-Pacific",
        "type": "column",
		"color": "#000000",
        "valueField": "asia"
    }, {
        "balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]:...