How to display column chart in group of y-axis format on pdf using itextsharp

But I am binding column chart to my database , i dont want just a image  like above, i gave here image for just refrence that means i want column chart in grouping of y axis elements  like above image. 

I used below code in my project, but am not getting output exactly as above image.
chart.Series[0].ChartType = SeriesChartType.Column;
List<PriceList> lst = new List<PriceList>();
lst = myclass.GetPrice(id);


for ( int i = 0; i < lst.Count; i++)
{
chart.Series[0].Points.AddXY(lst[i].vchValue.ToString(), lst[i].Percentage);
chart.Series[0].Points.AddXY(lst[i].vchValue.ToString(), lst[i].mValue.ToString());
}