Frequencies for first 10,000 rows of prov3515 variable in pos2002 dataset : srv: blood | admin-onsit | e-residents | Freq. Percent Cum. ------------+----------------------------------- | 7,326 73.26 73.26 N | 2,353 23.53 96.79 Y | 321 3.21 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017