Frequencies for first 10,000 rows of pt_onst_rsdnt_sw variable in pos2004 dataset : srv: phys | ther-onsite | -residents | Freq. Percent Cum. ------------+----------------------------------- | 7,489 74.89 74.89 N | 240 2.40 77.29 Y | 2,271 22.71 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017