var testData = [];
        for (var i = 0; i < 5; i++) {
            testData[i] = populationData[i].Census;
            console.log(testData[i]);
        }

        // the button action
        $('#button').click(function () {

            var mySeries = [];
            var data = [];
            for (var i = 0; i < 5; i++) {
                data[i] = parseFloat(testData[i]);
                mySeries[i] = data[i];
            }

            console.log(mySeries);
            var chart = $('#container').highcharts();
            chart.series[0].setData(mySeries);