Frequencies for first 10,000 rows of prov3285 variable in pos1998 dataset : srv: | physician-o | ffsite-resi | dents | Freq. Percent Cum. ------------+----------------------------------- | 7,422 74.22 74.22 N | 2,031 20.31 94.53 Y | 547 5.47 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016