Column chart with CSV data from textarea

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>
<textarea id="csv" style="width: 90%; height: 150px;">USA,2025
China,1882
Japan,1809
Germany,1322
UK,1122
France,1114

</textarea>
<input type="button" value="parse CSV" onclick="parseData();" />

CSS

#chartdiv {
    width : 100%;
    height : 250px;
    font-size : 11px;
}

JavaScript

var chartData = parseCsv();
var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
        "theme": "none",
        "dataProvider": chartData,
        "valueAxes": [{
        "gridColor": "#FFFFFF",
            "gridAlpha": 0.2,
            "dashLength": 0
    }],
        "gridAboveGraphs": true,
        "startDuration": 1,
        "graphs": [{
        "balloonText": "[[category]]: <b>[[value]]</b>",
            "fillAlphas": 0.8,
            "lineAlpha": 0.2,
            "type": "column",
            "valueField": "visits"
    }],
        "chartCursor": {
        "categoryBalloonEnabled": false,
            "cursorAlpha": 0,
            "zoomable": false
    },
        "categoryField": "country",
        "categoryAxis": {
        "gridPosition": "start",
            "gridAlpha": 0
    },
        "exportConfig": {
        "menuTop": 0,
            "menuItems": [{
            "icon": '/lib/3/images/export.png',
                "format": 'png'
        }]
    }
});

function parseCsv() {
    // get data
    var data = document.getElementById('csv').value;
    
    //replace UNIX new lines
    data = data.replace(/\r\n/g, "\n");
    //replace MAC new lines
    data = data.replace(/\r/g, "\n");
    //split into rows
    var rows = data.split("\n");

    var chartData = [];
    
    // loop through all rows
    for (var i = 0; i < rows.length; i++) {
        // this line helps to skip empty rows
        if (rows[i]) {
            // our columns are separated by comma
            var column = rows[i].split(",");

            // column is array now 
            // first item is category
            var date = column[0];
            // second item is value of the second column
            var value = column[1];

            // create object which contains all these items:
            var dataObject = {
                country: date,
                visits: value
            };
            // add object to chartData array
           ...