当我使用[[percents]时，amcharts上的错误在每列中显示100.00%

我的代码中有这个奇怪的错误。当我使用amcharts并试图显示每列的百分比时，每列都是100.00%。

AmCharts.ready(function () {
    $.ajax({
        url: 'Analytics/GetDivergenceByApp?appid=46',
        type: 'POST',
        contentType: 'application/json;',
        //data: JSON.stringify({ id: checkId }),
        success: function run(dataset) {
            // RADAR CHART
            chart = new AmCharts.AmSerialChart();
            chart.dataProvider = dataset;
            chart.categoryField = "col";
            chart.startDuration = 1;
            chart.sequencedAnimation = false;

            var categoryAxis = chart.categoryAxis;
            categoryAxis.gridPosition = "start";
            // VALUE AXIS
            var valueAxis = new AmCharts.ValueAxis();
            valueAxis.axisAlpha = 0.15;
            valueAxis.minimum = 0;
            valueAxis.dashLength = 3;
            valueAxis.stackType = "regular";
            chart.addValueAxis(valueAxis);

            // GRAPH
            var graph = new AmCharts.AmGraph();
            graph.type = "column";
            graph.labelText = "[[percents]]%";
            graph.valueField = "value";
            graph.title = "All Pushes";
            graph.fillAlphas = 0.6;
            graph.balloonText = "[[value]] os type installations";
            chart.addGraph(graph);
            // WRITE
            chart.write("chartdiv2");
        }
    });
});

我使用C#和MVC4来获取数据，我应该注意它在图表上看起来很好。我该如何修复它以显示实际百分比？