Frequencies for first 10,000 rows of pt_ofsite_rsdnt_sw variable in pos1999 dataset : srv: phys | ther-offsit | e-residents | Freq. Percent Cum. ------------+----------------------------------- | 7,387 73.87 73.87 N | 2,432 24.32 98.19 Y | 181 1.81 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017