echarts Y轴的刻度 跟数据对应---tooltip-formatter

var xAxisData = ['2018-01', '2018-02', '2018-03', '2018-04', '2018-05', '2018-06', '2018-07', '2018-08', '2018-09', '2018-10','2018-11','2018-12'];
var legendData= ['投诉量','解决量','投诉解决率'];
var title = "多横向折线图";
var serieData = [];
var metaDate = [
    [120, 140, 100, 120, 300, 230, 130, 170,140, 120, 300, 230],
    [200, 120, 300, 200, 170, 300, 200, 180,200, 190, 300, 200],
    [100,200, 140, 300, 200, 180, 100, 300, 230, 130, 100 ,300,]
]
for(var v=0; v < legendData.length ; v++){
    var serie = {
        name:legendData[v],
        type: 'line',
        symbol:"circle",
        symbolSize:10,
        data: metaDate[v]
    };
    serieData.push(serie)
}
var colors = ["#036BC8","#4A95FF","#5EBEFC","#2EF7F3","#FFFFFF"];
var option = {
    backgroundColor: '#0f375f',
    title : {text: title,textAlign:'left',textStyle:{color:"#fff",fontSize:"16",fontWeight:"normal"}},
    legend: {
        show:true,left:"right",data:legendData,y:"5%",
        itemWidth:18,itemHeight:12,textStyle:{color:"#fff",fontSize:14},
    },
    color:colors,
    grid: {left: '2%',top:"12%",bottom: "5%",right:"5%",containLabel: true},
    tooltip : { trigger: 'axis',axisPointer : { type : 'shadow'}},
    xAxis: [
        {   
            type: 'category',
            axisLine: { show: true,lineStyle:{ color:'#6173A3' }},
            axisLabel:{interval:0,textStyle:{color:'#9ea7c4',fontSize:14} },
            axisTick : {show: false},
            data:xAxisData,
        },
    ],
    yAxis: [
        {   
            axisTick : {show: false},
            splitLine: {show:false},
            axisLabel:{textStyle:{color:'#9ea7c4',fontSize:14} },
            axisLine: { show: true,lineStyle:{ color:'#6173A3'}},
        },
    ],
    series:serieData
};

tooltip: {
                            trigger: 'axis',
                            textStyle:{
                                fontSize:'12px',
                                aligin:'center',
                            },
                            formatter:function(params){  //数据单位格式化  
                               var relVal = params[0].name;  //x轴名称  
                               for (var i = 0, l = params.length; i < l; i++) {    
                                if(params[i].value){

                                   relVal += '<br/> ' + params[i].seriesName + ' : ' + params[i].value*100+"%";    
                                }
                               }  
                                   
                               return relVal;    
                            }
                        },