Frequencies for first 10,000 rows of pt_onst_rsdnt_sw variable in pos1994 dataset : srv: phys | ther-onsite | -residents | Freq. Percent Cum. ------------+----------------------------------- | 7,565 75.65 75.65 N | 252 2.52 78.17 Y | 2,183 21.83 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017