How to set Y-axis interval for column charts in Word document?

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;
using Syncfusion.OfficeChart;

//Set the minimum and maximum value of the Y-Axis.
chart.PrimaryValueAxis.MinimumValue = 0;
chart.PrimaryValueAxis.MaximumValue = 1600;
//Sets the interval for Y-Axis.
chart.PrimaryValueAxis.MajorUnit = 200;

//Create a new Word document.
using (WordDocument document = new WordDocument())
{
    //Add a section to the document.
    IWSection section = document.AddSection();
    //Add a paragraph to the section.
    IWParagraph paragraph = section.AddParagraph();
    //Create and append the chart to the paragraph.
    WChart chart = paragraph.AppendChart(446, 270);
    //Set chart type.
    chart.ChartType = OfficeChartType.Column_Clustered;
    //Set chart data.
    chart.ChartData.SetValue(1, 1, "Items");
    chart.ChartData.SetValue(1, 2, "Amount(in $)");
    chart.ChartData.SetValue(1, 3, "Count");
    chart.ChartData.SetValue(2, 1, "Beverages");
    chart.ChartData.SetValue(2, 2, 277);
    chart.ChartData.SetValue(2, 3, 925);
    chart.ChartData.SetValue(3, 1, "Condiments");
    chart.ChartData.SetValue(3, 2, 177);
    chart.ChartData.SetValue(3, 3, 378);
    chart.ChartData.SetValue(4, 1, "Confections");
    chart.ChartData.SetValue(4, 2, 387);
    chart.ChartData.SetValue(4, 3, 880);
    chart.ChartData.SetValue(5, 1, "Dairy Products");
    chart.ChartData.SetValue(5, 2, 1008);
    chart.ChartData.SetValue(5, 3, 581);
    chart.ChartData.SetValue(6, 1, "Grains/Cereals");
    chart.ChartData.SetValue(6, 2, 1500);
    chart.ChartData.SetValue(6, 3, 189);
    //Set chart series in the column for assigned data region.
    chart.IsSeriesInRows = false;
    IOfficeChartSerie serie1 = chart.Series.Add("Amount(in $)");
    //Set the data range of chart series – start row, start column, end row, end column.
    serie1.Values = chart.ChartData[2, 2, 6, 2];
    IOfficeChartSerie serie2 = chart.Series.Add("Count");
    //Set the data range of chart series – start row, start column, end row, end column.
    serie2.Values = chart.ChartData[2, 3, 6, 3];
    //Set Datalabels.
    chart.PrimaryCategoryAxis.CategoryLabels = chart.ChartData[2, 1, 6, 1];
    //Apply chart elements.
    //Set Chart Title.
    chart.ChartTitle = "Clustered Column Chart";
 
    //Set the minimum and maximum value of the Y-Axis.
    chart.PrimaryValueAxis.MinimumValue = 0;
    chart.PrimaryValueAxis.MaximumValue = 1600;
    //Sets the interval for Y-Axis.
    chart.PrimaryValueAxis.MajorUnit = 200;
 
    serie1.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
    serie2.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
    serie1.DataPoints.DefaultDataPoint.DataLabels.Position = OfficeDataLabelPosition.Center;
    serie2.DataPoints.DefaultDataPoint.DataLabels.Position = OfficeDataLabelPosition.Center;
    //Set Legend.
    chart.HasLegend = true;
    chart.Legend.Position = OfficeLegendPosition.Bottom;
    //Create a file stream.
    using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"../../../Sample.docx"), FileMode.Create, FileAccess.ReadWrite))
    {
        //Save the Word document to the file stream.
        document.Save(outputFileStream, FormatType.Docx);
    }
}