Contribution of each explanatory variable to R-square

[walaba]

I wish to determine the contribution of each covariate to the overall R square. How can I perform this procedure in Stata?

The following codewill provide adjusted R-square of 0.5902.

regress write female read math science socst prog

And I wish to obtain the contribution of individual explanatory variables to the observed R-Square

Thanks
Sample data accessed here:
use http://www.ats.ucla.edu/stat/stata/notes/hsb2

[daniel klein]

You might find this thread helpful.

Best
Daniel