3d surface plot from excel data?

Hello,

I am brand new to Mathcad so I apologize if this is an easy question.  I've been through the help, and the tutorials and have had no luck.

I have a simple spreadsheet in excel of histogram data (small sample below).  The top row represents the Y index, measuring the value of each histogram bucket.

The left-most column represents timestamps for each sample of data -- the X index.

The values in each cell represent the number of occurrences for a given value (bucket, Y index) at a given timestamp -- the Z index.

I would like to import this data into Mathcad and create a 3d surface plot.  I know how to get the data into Mathcad, but all I get is a blank graph.  Does anyone have any examples or tutorials of how to do this?  Surely this is a common need.

Thank you.