Which proc to use in the following scenario?

[karthigao]

Hi I have datasets that contain the storeid, count of product, percent of product, state, latitude and longitude. I wanted to produce the percent in US map (choropleth map) state wise. which procedure is best? what other details is required for the map? I am using it for the first time, if any one can explain in detail will be greatly appreciated?

[Reeza]

Take a look through Robert Allison's SAS/Graph Examples! and find an example that's closes to what you're looking for. 

His examples all have sample data and code to help.