How to populate Parameter values(values consisting the parameter) on x-axis of line graph in SSRS

I extracting data from Sharepoint List. One of List's column have duplicate values. I could do remove Duplicte operation on data with the help of Vb code and distinct values assigned to a SSRS report parameter.
Now I want this Distinct values(Example: 2010,2011,2012....)which are in Parameter, populate on x-axis of the SSRS Line Graph, then I want to sum of year values on Y-axis 
 Eagrly waitng for the solution.

Thanks

Sri