Chartjs-How do I make a pie chart showing number of people in an age group with JSON and ChartJS?

Figured it out myself after following Nagib’s comment link.

Just leaving it here in case anyone else is trying the same thing.

$(document).ready(function () {
    $.ajax({
        type: "Get",
        url: "/?handler=ageData",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (response) {

            var datatf = response.below35;
            var datafn = response.below49;
            var dataff = response.below55;
            var dataso = response.below60;
            var datasf = response.below65;
            var dataasf = response.above65;

            var cage = document.getElementById('ageChart').getContext('2d');
            var ageChart = new Chart(cage, {
                type: 'pie',
                data: {
                    labels: ['< 36', '36 - 49', '50 - 55', '56 - 60', '61 - 65', '> 65'],
                    datasets: [{
                        label: 'Age Group',
                        data: [datatf, datafn, dataff, dataso, datasf, dataasf],
                        backgroundColor: [
                            'rgba(255, 99, 132, 0.2)',
                            'rgba(54, 162, 235, 0.2)',
                            'rgba(255, 206, 86, 0.2)',
                            'rgba(75, 192, 192, 0.2)',
                            'rgba(153, 102, 255, 0.2)',
                            'rgba(255, 159, 64, 0.2)'
                        ],
                        borderColor: [
                            'rgba(255, 99, 132, 1)',
                            'rgba(54, 162, 235, 1)',
                            'rgba(255, 206, 86, 1)',
                            'rgba(75, 192, 192, 1)',
                            'rgba(153, 102, 255, 1)',
                            'rgba(255, 159, 64, 1)'
                        ],
                        borderWidth: 1
                    }]
                },
                options: {
                    scales: {
                        y: {
                            beginAtZero: true
                        }
                    }
                }
            });
        }
    });
});

And in my handler, the variables are the same as the one in the question and called it with JsonResult {...below35 = lessthreefive...}

End result