highcharts生成后的数据如何获取

根据data数组里面的值生成了百分比的统计图,pointFormat: '{point.percentage:.1f}%
现在想获取这些生成的百分比的数据.请问该如何获取呢?
$('#container3').highcharts({

            chart: {type:'pie', height:280,width:380, plotShadow: false }
            ,tooltip: {
                pointFormat: '{point.percentage:.1f}%',
                backgroundColor:"#555556",
                borderColor:"#555556",
                style: {color:'#fff',
                    fontSize: '12px',
                    padding: '5px'
                }
            },
            title: {
                text: ''
            },
            legend: {
                enabled: false
            },        
            plotOptions: { pie: { allowPointSelect: true, cursor: 'pointer', dataLabels: { enabled: false }, showInLegend: true } 
            }, 
            series: [{
            name:' ',
            data: [
                {name:'未知',y:449,color:'#44B549'},
                { name: 'iPhone 6', y: 33,color:"#4A90E2"},
                { name: 'iPhone 6 Plus', y: 24,color:"#EBCB6B"},
                {name: 'Windows 8-Windows 8', y: 22,color:"#BB7FB2"},
                { name: 'iPhone 4S', y: 17,color:"#DA7D2A"},
                { name: 'iPhone 5S(GSM)', y: 15,color:"#FFCE55"},
                { name: 'iPhone 5(GSM)', y: 11,color:"#6ED5E6"},
                { name: 'Apple-iPhone8;2', y: 9,color:"#F57BC1"},
                { name: 'Xiaomi-HM NOTE 1LTEarmeabi-v7a', y: 8,color:"#DCB186"},
                { name: 'Xiaomi-HM NOTE 1Sarmeabi-v7a', y: 8,color:"#647C9D"}
                ]

        });
// $('.highcharts-tooltip text').attr('y',6);

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dataLabels: {
                            enabled: true,
                            format: '<b>{point.name}</b>: {point.percentage:.1f} %',
                            style: {
                                color: (Highcharts.theme && Highcharts.theme.contrastTextColor) || 'black'
                            }
                        },

具体可以参考这个 https://github.com/JackPu/Highcharts-Lea...

Demo: http://codepen.io/Jack_Pu/pen/sywfJ

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把data 里的数据直接自己算