            dataLabels: {
                    enabled: true,
                    color: '#000000',
                    connectorColor: '#000000',
                    formatter: function() {
                        return '<b>'+ this.point.name +'</b>: '+ Math.round(this.percentage) +' %';
                    }
                }
            }
        },
        series: [{
            type: 'pie',
            name: 'Default',
            data: []
        }]
    });

    window.chart = chart;

    var filters 