highchairts柱状图显示数值并且带单位

$(target).highcharts({
chart: {
type: 'bar'
},
colors: [
"#1ab394"
],
title: {
text: title
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
credits: {
enabled: false
},
xAxis: {
categories: categories
},
yAxis: {
min: 0,
title: {
text: label + "(" + unit + ")"
}
},
tooltip: {
shared: true,
},
plotOptions: {
series: {
dataLabels: {
enabled: true,      //设置柱状图显示数值

formatter: function () {
return this.point.y + '%';  // 设置柱状图显示数值并且带单位
},
},
}
},
series: [{
name: label,
tooltip: {
valueSuffix: unit
},
data: data
}]
});
}
}