How to display data comparision data year wise

RadHtmlChart scatterChart = new RadHtmlChart();
           scatterChart.ID = "ScatterChart";
           scatterChart.Width = Unit.Pixel(680);
              scatterChart.Height = Unit.Pixel(400);

           scatterChart.Legend.Appearance.Position = Telerik.Web.UI.HtmlChart.ChartLegendPosition.Bottom;

           //scatterChart.PlotArea.XAxis.TitleAppearance.Text = "Volts";
          scatterChart.PlotArea.XAxis.TitleAppearance.Text = "Name";

          SeriesItem sitem;
              ColumnSeries clm;
              CategorySeriesItem item;
              DataTable dt=GetData();
              for (int i = 0; i < dt.Rows.Count; i++)
              {
                  clm = new ColumnSeries();
                  clm.LabelsAppearance.Visible = false;
                  clm.Name = dt.Rows[i]["Name"].ToString();
                  scatterChart.PlotArea.XAxis.DataLabelsField = dt.Rows[i]["Name"].ToString();
                  clm.GroupName = dt.Rows[i]["Year"].ToString();
                  ///

                  item = new CategorySeriesItem();

                  item.Y = Convert.ToInt32(dt.Rows[i]["Price1"]);
                  //    sitem.YValue = dt.Rows[i]["Year"].ToString();
                  //   clm.DataFieldY = dt.Rows[i]["Year"].ToString();
                  clm.SeriesItems.Add(item);
                  sitem = new SeriesItem();

                  scatterChart.PlotArea.Series.Add(clm);
              }

              //for (int i = 0; i < dt.Rows.Count; i++)
              //{
              //     scatterChart.PlotArea.XAxis.DataLabelsField = dt.Rows[i]["Name"].ToString();

              // }
          //     DataSet myDS = GetData();
             scatterChart.DataSource = dt;

             scatterChart.PlotArea.XAxis.LabelsAppearance.Visible = true;
             scatterChart.PlotArea.XAxis.LabelsAppearance.DataFormatString = "YYYY-mm";

             scatterChart.DataBind();
              Panel1.Controls.Add(scatterChart);