Highcharts: Unable to load all values on Xaxis - javascript

I am using highcharts and facing the issue.
In my data I have different ratings for different quarters and I am trying
to show all "ratings" on xaxis for all "quarters".
enter code here
<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="height: 400px"></div>
var response = {
"KBByRating":[
{
"FiscalQtr":"FY2018 Q4",
"FiscalQtrData":[
{
"Rating":"2.5",
"Count":1
},
{
"Rating":"4.0",
"Count":1
},
{
"Rating":"5.0",
"Count":1
}
]
},
{
"FiscalQtr":"FY2018 Q3",
"FiscalQtrData":[
{
"Rating":"2.33",
"Count":1
},
{
"Rating":"1.0",
"Count":3
},
{
"Rating":"5.0",
"Count":17
}
]
},
{
"FiscalQtr":"FY2018 Q2",
"FiscalQtrData":[
{
"Rating":"3.67",
"Count":1
},
{
"Rating":"5.0",
"Count":8
}
]
}
]
};
var ratings=[],ratingsCount=[],periodRatingData=[];
_.each(response.KBByRating, function(val){
ratings=[];
ratingsCount=[];
_.each(val.FiscalQtrData, function(main){
ratings.push(main.Rating),
ratingsCount.push(main.Count);
});
periodRatingData.push({
name: val.FiscalQtr,
data:ratingsCount
});
});
Highcharts.chart('container',
{
chart:{
type: 'column'
},
title: {
text: 'Knowledge Articles Published By Rating'
},
subtitle: {
text: ''
},
colors: ['#005073','#64e572','#24cbe5'],
xAxis: {
categories:ratings,
labels: {
formatter: function(){
var str = this.value;
if(str < 0){
str = '';
}
return str;
}
}
},
yAxis: {
min: 0,
title: {
text: 'Count',
align: 'middle'
},
labels: {
overflow: 'justify'
}
},
tooltip: {
formatter: function() {
return '' +'Count'+ ': ' + this.y;
}
},
plotOptions: {
column: {
dataLabels: {
enabled: true
}
},
series: {
pointWidth: 40,
groupPadding: '.05',
shadow: false
}
},
legend: {
layout: 'horizontal',
align: 'center',
verticalAlign: 'bottom',
floating: false,
labelFormatter: function() {
return '<div class="' + this.name + '-arrow"></div><span style="font-family: \'Advent Pro\', sans-serif; font-size:12px">' + this.name + '</span>';
}
},
credits: {
enabled: true
},
exporting: {
enabled: true
},
series: periodRatingData
});
but I am getting only few ratings which is not correct. Could you please
help out to fix this.
Here I have created live example on jsfiddle:
https://jsfiddle.net/ugyef9ju/

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Live demo: https://codepen.io/TorsteinHonsi/pen/RwoWPqd
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