Plotting Mean and SD on the same Line graph

Hello,

I have a requirement in which I need to plot the average and the Standard Deviation (Error bar) in the same graph. I am using Excel 2010.

I am making a line graph. I am able to plot average easily but with standard deviation, I am facing problems.

For every point on the line graph, I have different standard deviation and when I select "Custom" on the Standard Deviation Options and I specify the range of SD values for each point, I get the SD lines of the same size and they are so huge that it crosses the chart itself. I am sure I can't select "Fixed", "Percentage" as each of the SD value is different corresponding to each point (average value) on the line graph.

Any help on this will be highly appreciated.

Thanks!

EDIT: Sample File Attached - As you see in the chart, the line graph is plotted based on the "Average" values, I need to plot SD on those points as well.