public void LoadPlot()
{
var pairs = from row in DTable.AsEnumerable()
select new KeyValuePair <string, double>((string)row[1], double.Parse(row[3].ToString()));
BarPlot.ItemsSource = pairs.ToArray();
BarPlot.LegendItems.Clear();
BarPlot.LegendItems.Add("% of People");
}