Frequencies for first 10,000 rows of prov3515 variable in pos2005 dataset : srv: blood | admin-onsit | e-residents | Freq. Percent Cum. ------------+----------------------------------- | 7,474 74.74 74.74 N | 2,212 22.12 96.86 Y | 314 3.14 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017