HELP!!!

I am trying to create a 3-dimensional chart. My X-Axis will be "Lead
Source". My Y-Axis will be "Count" and the Z-Axis should be the "Year". The
idea here is to see how the counts have increased from year-to-year.

I am having some difficulty in trying to figure out how to build this
relationship. I have multiple worksheets with each year's data. Do I have to
get this on one work sheet before I can try and make this happen?

Any help would be GREATLY appreciated.

Thanks!