bootstrapping dea results in Stata -

I used to write dea in Stata to calculate public spending efficiency limitations in a sample of 34 countries. I am using The syntax of the command is:

  dea env tot_hexpav = le, rts (vrs)  

where left-hand variables env & Amp; [Code> tot_hexpav [An Environmental Composite indicator and Total Health Expenditure] Input and Le [Life expectancy] is output This command is for input-orientation and the scale of the variable returns ( Vrs ).

dea command gives only one matrix where all the results are saved: r (dearslt) . Now, I would like to bootstrap the performance score received from dea , which are the second columns of the r (dearslt) matrix - in simple words - the following Stata command:

  Bootstrap ** XXXX **, Representative (200): dea env tot_hexpav = le, rts (vrs)  

My question is ... dea < How to scale "x-list" xxxx to tell STATE to the second column of the matrix in the results of / code> after the code: I have tried many combinations, but without success